diff --git a/src/Backend.php b/src/Backend.php
index 8ab4859..b0fa89a 100644
--- a/src/Backend.php
+++ b/src/Backend.php
@@ -43,7 +43,7 @@ class Backend extends dcNsProcess
             'adminDashboardFavoritesV2'  => function (dcFavorites $favs): void {
                 $favs->register(My::id(), [
                     'title'      => My::name(),
-                    'url'        => dcCore::app()->adminurl->get(My::id()),
+                    'url'        => dcCore::app()->adminurl?->get(My::id()),
                     'small-icon' => urldecode(dcPage::getPF(My::id() . '/icon.svg')),
                     'large-icon' => urldecode(dcPage::getPF(My::id() . '/icon.svg')),
                     //'permissions' => null,
@@ -53,13 +53,13 @@ class Backend extends dcNsProcess
 
         dcCore::app()->menu[dcAdmin::MENU_PLUGINS]->addItem(
             My::name(),
-            dcCore::app()->adminurl->get(My::id()),
+            dcCore::app()->adminurl?->get(My::id()),
             dcPage::getPF(My::id() . '/icon.svg'),
             preg_match(
-                '/' . preg_quote(dcCore::app()->adminurl->get(My::id())) . '(&.*)?$/',
+                '/' . preg_quote((string) dcCore::app()->adminurl?->get(My::id())) . '(&.*)?$/',
                 $_SERVER['REQUEST_URI']
             ),
-            dcCore::app()->auth->isSuperAdmin()
+            dcCore::app()->auth?->isSuperAdmin()
         );
 
         return true;
diff --git a/src/BackendBehaviors.php b/src/BackendBehaviors.php
index f6ed398..c42654a 100644
--- a/src/BackendBehaviors.php
+++ b/src/BackendBehaviors.php
@@ -51,7 +51,7 @@ class BackendBehaviors
     {
         if ($list->getList() != $prop['type'] . '-activate'
             || !self::translater()->getSetting($prop['type'] . '_menu')
-            || !dcCore::app()->auth->isSuperAdmin()
+            || !dcCore::app()->auth?->isSuperAdmin()
         ) {
             return null;
         }
@@ -77,7 +77,7 @@ class BackendBehaviors
             return;
         }
 
-        dcCore::app()->adminurl->redirect(
+        dcCore::app()->adminurl?->redirect(
             My::id(),
             ['part' => 'module', 'type' => $type, 'module' => key($_POST['translater'])],
             '#module-lang'
diff --git a/src/Config.php b/src/Config.php
index 7c06103..d3a967c 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -63,7 +63,7 @@ class Config extends dcNsProcess
             dcPage::addSuccessNotice(
                 __('Configuration successfully updated.')
             );
-            dcCore::app()->adminurl->redirect(
+            dcCore::app()->adminurl?->redirect(
                 'admin.plugins',
                 ['module' => My::id(), 'conf' => 1, 'redir' => dcCore::app()->admin->__get('list')->getRedir()]
             );
diff --git a/src/Manage.php b/src/Manage.php
index 7136507..3bb5ea2 100644
--- a/src/Manage.php
+++ b/src/Manage.php
@@ -92,7 +92,7 @@ class Manage extends dcNsProcess
             }
 
             if ($current->action == 'module_import_pack') {
-                if (empty($_FILES['packfile']['name'])) {
+                if (empty($current->module) || empty($_FILES['packfile']['name'])) {
                     throw new Exception(__('Nothing to import'));
                 }
                 $current->module->importPack($_FILES['packfile']);
@@ -146,23 +146,23 @@ class Manage extends dcNsProcess
 
     public static function render(): void
     {
-        if (!self::$init) {
+        if (!static::$init) {
             return;
         }
 
         $current = ManageVars::init();
 
-        $breadcrumb = [My::name() => dcCore::app()->adminurl->get(My::id(), ['type' => '-'])];
+        $breadcrumb = [My::name() => dcCore::app()->adminurl?->get(My::id(), ['type' => '-'])];
         if (empty($current->type)) {
             $breadcrumb = [My::name() => ''];
         } elseif (empty($current->module)) {
             $breadcrumb[$current->type == 'plugin' ? __('Plugins') : __('Themes')] = '';
         } elseif (empty($current->lang)) {
-            $breadcrumb[$current->type == 'plugin' ? __('Plugins') : __('Themes')] = dcCore::app()->adminurl->get(My::id(), ['type' => $current->type]);
+            $breadcrumb[$current->type == 'plugin' ? __('Plugins') : __('Themes')] = dcCore::app()->adminurl?->get(My::id(), ['type' => $current->type]);
             $breadcrumb[html::escapeHTML($current->module->name)]                  = '';
         } elseif (!empty($current->lang)) {
-            $breadcrumb[$current->type == 'plugin' ? __('Plugins') : __('Themes')]                  = dcCore::app()->adminurl->get(My::id(), ['type' => $current->type]);
-            $breadcrumb[html::escapeHTML($current->module->name)]                                   = dcCore::app()->adminurl->get(My::id(), ['type' => $current->type, 'module' => $current->module->id]);
+            $breadcrumb[$current->type == 'plugin' ? __('Plugins') : __('Themes')]                  = dcCore::app()->adminurl?->get(My::id(), ['type' => $current->type]);
+            $breadcrumb[html::escapeHTML($current->module->name)]                                   = dcCore::app()->adminurl?->get(My::id(), ['type' => $current->type, 'module' => $current->module->id]);
             $breadcrumb[html::escapeHTML(sprintf(__('%s language edition'), $current->lang->name))] = '';
         }
 
@@ -187,7 +187,7 @@ class Manage extends dcNsProcess
 
         if (empty($current->module) && $current->type != '') {
             // modules list
-            echo '<form id="theme-form" method="post" action="' . dcCore::app()->adminurl->get(My::id(), ['type' => 'plugin']) . '">';
+            echo '<form id="theme-form" method="post" action="' . dcCore::app()->adminurl?->get(My::id(), ['type' => 'plugin']) . '">';
 
             $res     = '';
             $modules = $current->translater->getModules($current->type);
@@ -199,7 +199,7 @@ class Manage extends dcNsProcess
                 if ($module->root_writable) {
                     $res .= sprintf(
                         '<tr class="line"><td class="nowrap minimal"><a href="%s" title="%s">%s</a></td>',
-                        dcCore::app()->adminurl->get(My::id(), ['type' => $module->type, 'module' => $module->id]),
+                        dcCore::app()->adminurl?->get(My::id(), ['type' => $module->type, 'module' => $module->id]),
                         html::escapeHTML(sprintf(__('Translate module %s'), __($module->name))),
                         html::escapeHTML($module->id)
                     );
@@ -215,7 +215,7 @@ class Manage extends dcNsProcess
                         $codes[$code_id] = sprintf(
                             '<a class="wait maximal nowrap" title="%s" href="%s">%s (%s)</a>',
                             html::escapeHTML(sprintf(__('Edit language %s of module %s'), html::escapeHTML($code_name), __($module->name))),
-                            dcCore::app()->adminurl->get(My::id(), ['type' => $module->type, 'module' => $module->id, 'lang' => $code_id]),
+                            dcCore::app()->adminurl?->get(My::id(), ['type' => $module->type, 'module' => $module->id, 'lang' => $code_id]),
                             html::escapeHTML($code_name),
                             $code_id
                         );
@@ -267,7 +267,7 @@ class Manage extends dcNsProcess
             if (count($codes)) {
                 echo
                 '<div class="clear fieldset"><h3>' . __('Translations') . '</h3>' .
-                '<form id="module-translations-form" method="post" action="' . dcCore::app()->adminurl->get(My::id()) . '">' .
+                '<form id="module-translations-form" method="post" action="' . dcCore::app()->adminurl?->get(My::id()) . '">' .
                 '<table class="clear maximal">' .
                 '<caption>' . __('Existing languages translations') . '</caption>' .
                 '<tr>' .
@@ -283,7 +283,7 @@ class Manage extends dcNsProcess
                     '<td class="minimal">' . form::checkbox(['codes[]', 'existing_code_' . $code_id], $code_id, '', '', '', false) . '</td>' .
                     '<td class="nowrap">' .
                     '<a href="' .
-                        dcCore::app()->adminurl->get(My::id(), ['type' => $current->module->type, 'module' => $current->module->id, 'lang' => $code_id])
+                        dcCore::app()->adminurl?->get(My::id(), ['type' => $current->module->type, 'module' => $current->module->id, 'lang' => $code_id])
                          . '" title="' . sprintf(__('Edit %s language'), html::escapeHTML($code_name)) . '">' . $code_name . '</a>' .
                     '</td>' .
                     '<td class="nowrap maximal"> ' . $code_id . '</td>';
@@ -297,7 +297,7 @@ class Manage extends dcNsProcess
                         echo
                         '<td class="nowrap">' . count($backups[$code_id]) . '</td>' .
                         '<td class="nowrap"> ' .
-                        dt::str('%Y-%m-%d %H:%M', (int) $time[$code_id], dcCore::app()->blog->settings->get('system')->get('blog_timezone')) .
+                        dt::str('%Y-%m-%d %H:%M', (int) $time[$code_id], (string) dcCore::app()->blog?->settings->get('system')->get('blog_timezone')) .
                         '</td>';
                     } else {
                         echo '<td class="nowrap">' . __('no backups') . '</td><td class="maximal nowrap">-</td>';
@@ -316,7 +316,7 @@ class Manage extends dcNsProcess
                 ]) . ' 
                 <input id="do-action" type="submit" value="' . __('ok') . '" /></p>' .
                 dcCore::app()->formNonce() .
-                dcCore::app()->adminurl->getHiddenFormFields(
+                dcCore::app()->adminurl?->getHiddenFormFields(
                     My::id(),
                     ['type' => $current->module->type, 'module' => $current->module->id]
                 ) . '
@@ -328,7 +328,7 @@ class Manage extends dcNsProcess
                 // delete / retore backups
                 if (!empty($backups)) {
                     echo '<div class="fieldset"><h3>' . __('Backups') . '</h3>' .
-                    '<form id="module-backups-form" method="post" action="' . dcCore::app()->adminurl->get(My::id()) . '">' .
+                    '<form id="module-backups-form" method="post" action="' . dcCore::app()->adminurl?->get(My::id()) . '">' .
                     '<table class="clear">' .
                     '<caption>' . __('Existing languages backups') . '</caption>' .
                     '<tr>' .
@@ -360,9 +360,9 @@ class Manage extends dcNsProcess
                                 $backup_code['name'],
                                 $backup_code['code'],
                                 dt::str(
-                                    dcCore::app()->blog->settings->get('system')->get('date_format') . ' ' . dcCore::app()->blog->settings->get('system')->get('time_format'),
+                                    dcCore::app()->blog?->settings->get('system')->get('date_format') . ' ' . dcCore::app()->blog?->settings->get('system')->get('time_format'),
                                     (int) $backup_code['time'],
-                                    dcCore::app()->blog->settings->get('system')->get('blog_timezone')
+                                    dcCore::app()->blog?->settings->get('system')->get('blog_timezone')
                                 ),
                                 $backup_code['path']['basename'],
                                 files::size($backup_code['size'])
@@ -381,7 +381,7 @@ class Manage extends dcNsProcess
                     ]) . '
                     <input id="do-action" type="submit" value="' . __('ok') . '" /></p>' .
                     dcCore::app()->formNonce() .
-                    dcCore::app()->adminurl->getHiddenFormFields(
+                    dcCore::app()->adminurl?->getHiddenFormFields(
                         My::id(),
                         ['type' => $current->module->type, 'module' => $current->module->id]
                     ) . '
@@ -394,9 +394,9 @@ class Manage extends dcNsProcess
             // add language
             if (!empty($unused_codes)) {
                 echo '<div class="col fieldset"><h3>' . __('Add language') . '</h3>
-                <form id="muodule-code-create-form" method="post" action="' . dcCore::app()->adminurl->get(My::id()) . '">
+                <form id="muodule-code-create-form" method="post" action="' . dcCore::app()->adminurl?->get(My::id()) . '">
                 <p class="field"><label for="code">' . __('Select language:') . '</label>' .
-                form::combo(['code'], array_merge(['-' => '-'], $unused_codes), dcCore::app()->auth->getInfo('user_lang')) . '</p>';
+                form::combo(['code'], array_merge(['-' => '-'], $unused_codes), (string) dcCore::app()->auth?->getInfo('user_lang')) . '</p>';
                 if (empty($codes)) {
                     echo '<p>' . form::hidden(['from'], '') . '</p>';
                 } else {
@@ -407,7 +407,7 @@ class Manage extends dcNsProcess
                 echo '
                 <p><input type="submit" name="save" value="' . __('Create') . '" />' .
                 dcCore::app()->formNonce() .
-                dcCore::app()->adminurl->getHiddenFormFields(
+                dcCore::app()->adminurl?->getHiddenFormFields(
                     My::id(),
                     ['type' => $current->module->type, 'module' => $current->module->id, 'action' => 'module_add_code']
                 ) . '
@@ -416,13 +416,13 @@ class Manage extends dcNsProcess
 
             // Import
             echo '<div class="col fieldset"><h3>' . __('Import') . '</h3>
-            <form id="module-pack-import-form" method="post" action="' . dcCore::app()->adminurl->get(My::id()) . '" enctype="multipart/form-data">
+            <form id="module-pack-import-form" method="post" action="' . dcCore::app()->adminurl?->get(My::id()) . '" enctype="multipart/form-data">
             <p><label for="packfile">' . __('Select languages package to import:') . '<label> ' .
             '<input id="packfile" type="file" name="packfile" /></p>
             <p>
             <input type="submit" name="save" value="' . __('Import') . '" />' .
             dcCore::app()->formNonce() .
-            dcCore::app()->adminurl->getHiddenFormFields(
+            dcCore::app()->adminurl?->getHiddenFormFields(
                 My::id(),
                 ['type' => $current->module->type, 'module' => $current->module->id, 'action' => 'module_import_pack']
             ) . '
@@ -437,7 +437,7 @@ class Manage extends dcNsProcess
 
             echo
             '<div id="lang-form">' .
-            '<form id="lang-edit-form" method="post" action="' . dcCore::app()->adminurl->get(My::id()) . '">' .
+            '<form id="lang-edit-form" method="post" action="' . dcCore::app()->adminurl?->get(My::id()) . '">' .
             '<table class="table-outer">' .
             '<caption>' . sprintf(__('List of %s localized strings'), count($lines)) . '</caption>' .
             '<tr>' .
@@ -475,7 +475,7 @@ class Manage extends dcNsProcess
                     foreach ($v as $str) {
                         $res[] = sprintf($table_li, html::escapeHTML($str['module'] . ':' . $str['file']));
                     }
-                    $t_msgstr[] = sprintf($table_ul, html::escapeHTML($k), implode('', $res));
+                    $t_msgstr[] = sprintf($table_ul, html::escapeHTML((string) $k), implode('', $res));
                 }
 
                 if (!empty($rs['files'][0])) {
@@ -519,7 +519,7 @@ class Manage extends dcNsProcess
                             foreach ($v as $str) {
                                 $res[] = sprintf($table_li, html::escapeHTML($str['module'] . ':' . $str['file']));
                             }
-                            $t_msgstr[] = sprintf($table_ul, html::escapeHTML($k), implode('', $res));
+                            $t_msgstr[] = sprintf($table_ul, html::escapeHTML((string) $k), implode('', $res));
                         }
 
                         echo sprintf(
@@ -562,9 +562,9 @@ class Manage extends dcNsProcess
             '<input id="do-action" type="submit" value="' . __('Save') . ' (s)" accesskey="s" /></p>' .
             dcCore::app()->formNonce() .
             form::hidden(['code'], $current->lang->code) .
-            dcCore::app()->adminurl->getHiddenFormFields(
+            dcCore::app()->adminurl?->getHiddenFormFields(
                 My::id(),
-                ['type' => $current->module->type, 'module' => $current->module->id, 'lang' => $current->lang->code, 'action' => 'module_update_code']
+                ['type' => $current->module?->type, 'module' => $current->module?->id, 'lang' => $current->lang->code, 'action' => 'module_update_code']
             ) .
             '</p></div>' .
             '</form>' .
@@ -579,13 +579,13 @@ class Manage extends dcNsProcess
                     '<h3><ul class="nice">%s</ul></h3>',
                     sprintf(
                         $line,
-                        dcCore::app()->adminurl->get(My::id(), ['type' => 'plugin']),
+                        dcCore::app()->adminurl?->get(My::id(), ['type' => 'plugin']),
                         $current->type == 'plugin' ? ' class="active"' : '',
                         __('Translate plugins')
                     ) .
                     sprintf(
                         $line,
-                        dcCore::app()->adminurl->get(My::id(), ['type' => 'theme']),
+                        dcCore::app()->adminurl?->get(My::id(), ['type' => 'theme']),
                         $current->type == 'theme' ? ' class="active"' : '',
                         __('Translate themes')
                     )
@@ -603,13 +603,13 @@ class Manage extends dcNsProcess
 
         $redir = [
             'type'   => $current->type,
-            'module' => $current->module->id,
+            'module' => $current->module?->id,
         ];
         if ($lang) {
             $redir['lang'] = $lang;
         }
 
         dcPage::addSuccessNotice($msg);
-        dcCore::app()->adminurl->redirect(My::id(), $redir);
+        dcCore::app()->adminurl?->redirect(My::id(), $redir);
     }
 }
diff --git a/src/My.php b/src/My.php
index 1e1efe6..ba9e548 100644
--- a/src/My.php
+++ b/src/My.php
@@ -43,6 +43,14 @@ class My
         return __((string) dcCore::app()->plugins->moduleInfo(self::id(), 'name'));
     }
 
+    /**
+     * Check php version
+     */
+    public static function phpCompliant(): bool
+    {
+        return version_compare(phpversion(), self::PHP_MIN, '>=');
+    }
+
     /**
      * List of allowed backup folder
      */
diff --git a/src/Settings.php b/src/Settings.php
index 70140a8..3c480c8 100644
--- a/src/Settings.php
+++ b/src/Settings.php
@@ -68,23 +68,23 @@ class Settings
      */
     public function __construct()
     {
-        $s = dcCore::app()->blog->settings->get(My::id());
+        $s = dcCore::app()->blog?->settings->get(My::id());
 
-        $this->plugin_menu      = (bool) ($s->get('plugin_menu') ?? false);
-        $this->theme_menu       = (bool) ($s->get('theme_menu') ?? false);
-        $this->backup_auto      = (bool) ($s->get('backup_auto') ?? false);
-        $this->backup_limit     = (int) ($s->get('backup_limit') ?? 20);
-        $this->backup_folder    = (string) ($s->get('backup_folder') ?? 'module');
-        $this->start_page       = (string) ($s->get('start_page') ?? '-');
-        $this->write_langphp    = (bool) ($s->get('write_langphp') ?? false);
-        $this->scan_tpl         = (bool) ($s->get('scan_tpl') ?? true);
-        $this->parse_nodc       = (bool) ($s->get('parse_nodc') ?? true);
-        $this->hide_default     = (bool) ($s->get('hide_default') ?? true);
-        $this->parse_comment    = (bool) ($s->get('parse_comment') ?? false);
-        $this->parse_user       = (bool) ($s->get('parse_user') ?? false);
-        $this->parse_userinfo   = (string) ($s->get('parse_userinfo') ?? 'displayname, email');
-        $this->import_overwrite = (bool) ($s->get('import_overwrite') ?? false);
-        $this->export_filename  = (string) ($s->get('export_filename') ?? 'type-module-l10n-timestamp');
+        $this->plugin_menu      = (bool) ($s?->get('plugin_menu') ?? false);
+        $this->theme_menu       = (bool) ($s?->get('theme_menu') ?? false);
+        $this->backup_auto      = (bool) ($s?->get('backup_auto') ?? false);
+        $this->backup_limit     = (int) ($s?->get('backup_limit') ?? 20);
+        $this->backup_folder    = (string) ($s?->get('backup_folder') ?? 'module');
+        $this->start_page       = (string) ($s?->get('start_page') ?? '-');
+        $this->write_langphp    = (bool) ($s?->get('write_langphp') ?? false);
+        $this->scan_tpl         = (bool) ($s?->get('scan_tpl') ?? true);
+        $this->parse_nodc       = (bool) ($s?->get('parse_nodc') ?? true);
+        $this->hide_default     = (bool) ($s?->get('hide_default') ?? true);
+        $this->parse_comment    = (bool) ($s?->get('parse_comment') ?? false);
+        $this->parse_user       = (bool) ($s?->get('parse_user') ?? false);
+        $this->parse_userinfo   = (string) ($s?->get('parse_userinfo') ?? 'displayname, email');
+        $this->import_overwrite = (bool) ($s?->get('import_overwrite') ?? false);
+        $this->export_filename  = (string) ($s?->get('export_filename') ?? 'type-module-l10n-timestamp');
     }
 
     public function getSetting(string $key): mixed
@@ -103,8 +103,8 @@ class Settings
     public function writeSetting(string $key, mixed $value): bool
     {
         if (property_exists($this, $key) && settype($value, gettype($this->{$key})) === true) {
-            dcCore::app()->blog->settings->get(My::id())->drop($key);
-            dcCore::app()->blog->settings->get(My::id())->put($key, $value, gettype($this->{$key}), '', true, true);
+            dcCore::app()->blog?->settings->get(My::id())->drop($key);
+            dcCore::app()->blog?->settings->get(My::id())->put($key, $value, gettype($this->{$key}), '', true, true);
 
             return true;
         }
diff --git a/src/Translater.php b/src/Translater.php
index 2844ca9..7035bb3 100644
--- a/src/Translater.php
+++ b/src/Translater.php
@@ -55,7 +55,7 @@ class Translater extends Settings
 
         if (!(dcCore::app()->themes instanceof dcThemes)) {
             dcCore::app()->themes = new dcThemes();
-            dcCore::app()->themes->loadModules(dcCore::app()->blog->themes_path, null);
+            dcCore::app()->themes->loadModules((string) dcCore::app()->blog?->themes_path, null);
         }
 
         foreach ([
diff --git a/src/TranslaterLang.php b/src/TranslaterLang.php
index c1d480d..8a1ddd7 100644
--- a/src/TranslaterLang.php
+++ b/src/TranslaterLang.php
@@ -131,11 +131,11 @@ class TranslaterLang
             $msgs     = [];
             # php files
             if ($extension == 'php') {
-                $msgs = Translater::extractPhpMsgs($contents);
+                $msgs = Translater::extractPhpMsgs((string) $contents);
 
             # tpl files
             } elseif ($extension == 'html') {
-                $msgs = Translater::extractTplMsgs($contents);
+                $msgs = Translater::extractTplMsgs((string) $contents);
             }
             foreach ($msgs as $msg) {
                 $res[] = [
diff --git a/src/TranslaterModule.php b/src/TranslaterModule.php
index 2ebf11d..bd82fa6 100644
--- a/src/TranslaterModule.php
+++ b/src/TranslaterModule.php
@@ -68,7 +68,7 @@ class TranslaterModule
         $this->author        = $define->get('author');
         $this->version       = $define->get('version');
         $this->root_writable = $define->get('root_writable');
-        $this->root          = path::real($define->get('root'));
+        $this->root          = (string) path::real($define->get('root'), false);
         $this->locales       = $this->root . DIRECTORY_SEPARATOR . My::LOCALES_FOLDER;
     }
 
@@ -94,15 +94,15 @@ class TranslaterModule
             case 'plugin':
                 $exp = explode(PATH_SEPARATOR, DC_PLUGINS_ROOT);
                 $tmp = path::real(array_pop($exp));
-                if ($tmp && is_writable($tmp)) {
+                if ($tmp !== false && is_writable($tmp)) {
                     $dir = $tmp;
                 }
 
                 break;
 
             case 'public':
-                $tmp = path::real(dcCore::app()->blog->public_path);
-                if ($tmp && is_writable($tmp)) {
+                $tmp = path::real((string) dcCore::app()->blog?->public_path);
+                if ($tmp !== false && is_writable($tmp)) {
                     $dir = $tmp;
                 }
 
@@ -110,7 +110,7 @@ class TranslaterModule
 
             case 'cache':
                 $tmp = path::real(DC_TPL_CACHE);
-                if ($tmp && is_writable($tmp)) {
+                if ($tmp !== false && is_writable($tmp)) {
                     @mkDir($tmp . '/l10n');
                     $dir = $tmp . '/l10n';
                 }
@@ -119,7 +119,7 @@ class TranslaterModule
 
             case 'translater':
                 $tmp = path::real(dcCore::app()->plugins->moduleRoot(My::id()));
-                if ($tmp && is_writable($tmp)) {
+                if ($tmp !== false && is_writable($tmp)) {
                     @mkDir($tmp . DIRECTORY_SEPARATOR . My::LOCALES_FOLDER);
                     $dir = $tmp . DIRECTORY_SEPARATOR . My::LOCALES_FOLDER;
                 }
@@ -185,8 +185,11 @@ class TranslaterModule
     public function createBackup(string $lang): bool
     {
         $backup = $this->getBackupRoot(true);
-        $dir    = $this->locales . DIRECTORY_SEPARATOR . $lang;
+        if (!$backup) {
+            return false;
+        }
 
+        $dir = $this->locales . DIRECTORY_SEPARATOR . $lang;
         if (!is_dir($dir)) {
             throw new Exception(sprintf(
                 __('Failed to find language %s'),
@@ -549,7 +552,7 @@ class TranslaterModule
 
                 files::putContent(
                     implode(DIRECTORY_SEPARATOR, [$this->locales, $lang, $file]),
-                    file_get_contents(implode(DIRECTORY_SEPARATOR, [$this->locales, $from_lang, $file]))
+                    (string) file_get_contents(implode(DIRECTORY_SEPARATOR, [$this->locales, $from_lang, $file]))
                 );
             }
         } else {
@@ -619,6 +622,7 @@ class TranslaterModule
         }
 
         foreach ($rs as $group => $msgs) {
+            $group = (string) $group;
             $this->setPoContent($lang, $group, $msgs);
             $this->setLangphpContent($lang, $group, $msgs);
         }
@@ -687,7 +691,7 @@ class TranslaterModule
                 $search  = My::defaultUserInformations();
                 $replace = [];
                 foreach ($search as $n) {
-                    $replace[] = dcCore::app()->auth->getInfo('user_' . $n);
+                    $replace[] = dcCore::app()->auth?->getInfo('user_' . $n);
                 }
                 $info = trim(str_replace($search, $replace, $this->translater->parse_userinfo));
                 if (!empty($info)) {
@@ -702,7 +706,7 @@ class TranslaterModule
         '"Project-Id-Version: ' . $this->id . ' ' . $this->version . '\n"' . "\n" .
         '"POT-Creation-Date: \n"' . "\n" .
         '"PO-Revision-Date: ' . date('c') . '\n"' . "\n" .
-        '"Last-Translator: ' . dcCore::app()->auth->getInfo('user_cn') . '\n"' . "\n" .
+        '"Last-Translator: ' . dcCore::app()->auth?->getInfo('user_cn') . '\n"' . "\n" .
         '"Language-Team: \n"' . "\n" .
         '"MIME-Version: 1.0\n"' . "\n" .
         '"Content-Transfer-Encoding: 8bit\n"' . "\n" .
@@ -779,7 +783,7 @@ class TranslaterModule
                 $search  = My::defaultUserInformations();
                 $replace = [];
                 foreach ($search as $n) {
-                    $replace[] = dcCore::app()->auth->getInfo('user_' . $n);
+                    $replace[] = dcCore::app()->auth?->getInfo('user_' . $n);
                 }
                 $info = trim(str_replace($search, $replace, $this->translater->parse_userinfo));
                 if (!empty($info)) {