diff --git a/src/Backend.php b/src/Backend.php
index 7bd18a9..3d211ec 100644
--- a/src/Backend.php
+++ b/src/Backend.php
@@ -40,7 +40,7 @@ class Backend extends dcNsProcess
         dcCore::app()->addBehavior('adminDashboardFavoritesV2', function (dcFavorites $favs): void {
             $favs->register(My::id(), [
                 'title'      => My::name(),
-                'url'        => dcCore::app()->adminurl->get('admin.plugin.' . My::id(), [], '#packman-repository-repository'),
+                'url'        => dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), [], '#packman-repository-repository'),
                 'small-icon' => [dcPage::getPF(My::id() . '/icon.svg'), dcPage::getPF(My::id() . '/icon-dark.svg')],
                 'large-icon' => [dcPage::getPF(My::id() . '/icon.svg'), dcPage::getPF(My::id() . '/icon-dark.svg')],
                 //'permissions' => dcCore::app()->auth->isSuperAdmin(),
@@ -49,10 +49,10 @@ class Backend extends dcNsProcess
 
         dcCore::app()->menu[dcAdmin::MENU_PLUGINS]->addItem(
             My::name(),
-            dcCore::app()->adminurl->get('admin.plugin.' . My::id()) . '#packman-repository-repository',
+            dcCore::app()->adminurl?->get('admin.plugin.' . My::id()) . '#packman-repository-repository',
             [dcPage::getPF(My::id() . '/icon.svg'), dcPage::getPF(My::id() . '/icon-dark.svg')],
-            preg_match('/' . preg_quote(dcCore::app()->adminurl->get('admin.plugin.' . My::id())) . '(&.*)?$/', $_SERVER['REQUEST_URI']),
-            dcCore::app()->auth->isSuperAdmin()
+            preg_match('/' . preg_quote((string) dcCore::app()->adminurl?->get('admin.plugin.' . My::id())) . '(&.*)?$/', $_SERVER['REQUEST_URI']),
+            dcCore::app()->auth?->isSuperAdmin()
         );
 
         return true;
diff --git a/src/Config.php b/src/Config.php
index 8dec66c..ed78a29 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -61,7 +61,7 @@ class Config extends dcNsProcess
             dcPage::addSuccessNotice(
                 __('Configuration has been successfully updated.')
             );
-            dcCore::app()->adminurl->redirect('admin.plugins', [
+            dcCore::app()->adminurl?->redirect('admin.plugins', [
                 'module' => My::id(),
                 'conf'   => '1',
                 'redir'  => dcCore::app()->admin->__get('list')->getRedir(),
@@ -87,12 +87,13 @@ class Config extends dcNsProcess
         $img_on  = sprintf($img, __('writable'), 'check-on.png');
         $img_off = sprintf($img, __('not writable'), 'check-off.png');
 
-        $check_repo   = Utils::is_writable(Utils::getRepositoryDir($s->pack_repository), '_.zip') ? $img_on : $img_off;
-        $check_first  = !empty($s->pack_filename)       && Utils::is_writable(Utils::getRepositoryDir($repo), $s->pack_filename) ? $img_on : $img_off;
-        $check_second = !empty($s->secondpack_filename) && Utils::is_writable(Utils::getRepositoryDir($repo), $s->secondpack_filename) ? $img_on : $img_off;
+        $repo         = Utils::getRepositoryDir($s->pack_repository);
+        $check_repo   = Utils::is_writable($repo, '_.zip') ? $img_on : $img_off;
+        $check_first  = !empty($s->pack_filename)       && Utils::is_writable($repo, $s->pack_filename) ? $img_on : $img_off;
+        $check_second = !empty($s->secondpack_filename) && Utils::is_writable($repo, $s->secondpack_filename) ? $img_on : $img_off;
 
         $is_configured = Utils::is_configured(
-            Utils::getRepositoryDir($s->pack_repository),
+            $repo,
             $s->pack_filename,
             $s->secondpack_filename
         );
@@ -117,7 +118,7 @@ class Config extends dcNsProcess
                 (new Note())->class('form-note')->text(
                     sprintf(
                         __('Preconization: %s'),
-                        dcCore::app()->blog->public_path ?
+                        dcCore::app()->blog?->public_path ?
                         dcCore::app()->blog->public_path : __("Blog's public directory")
                     ) . ' ' . __('Leave it empty to use Dotclear VAR directory')
                 ),
diff --git a/src/Core.php b/src/Core.php
index c558775..7372c3b 100644
--- a/src/Core.php
+++ b/src/Core.php
@@ -164,7 +164,7 @@ class Core
                 $zip->addExclusion($e);
             }
             $zip->addDirectory(
-                path::real($info['root']),
+                (string) path::real($info['root'], false),
                 $info['id'],
                 true
             );
diff --git a/src/Manage.php b/src/Manage.php
index 802deb9..42e72e7 100644
--- a/src/Manage.php
+++ b/src/Manage.php
@@ -52,7 +52,7 @@ class Manage extends dcNsProcess
         # Modules
         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);
         }
         $themes  = dcCore::app()->themes;
         $plugins = dcCore::app()->plugins;
@@ -113,7 +113,7 @@ class Manage extends dcNsProcess
                 if (!empty($_POST['redir'])) {
                     http::redirect($_POST['redir']);
                 } else {
-                    dcCore::app()->adminurl->redirect('admin.plugin.' . My::id(), [], '#packman-' . $type);
+                    dcCore::app()->adminurl?->redirect('admin.plugin.' . My::id(), [], '#packman-' . $type);
                 }
 
             # Pack
@@ -151,7 +151,7 @@ class Manage extends dcNsProcess
                 if (!empty($_POST['redir'])) {
                     http::redirect($_POST['redir']);
                 } else {
-                    dcCore::app()->adminurl->redirect('admin.plugin.' . My::id(), [], '#packman-' . $type);
+                    dcCore::app()->adminurl?->redirect('admin.plugin.' . My::id(), [], '#packman-' . $type);
                 }
 
             # Delete
@@ -176,7 +176,7 @@ class Manage extends dcNsProcess
                 if (!empty($_POST['redir'])) {
                     http::redirect($_POST['redir']);
                 } else {
-                    dcCore::app()->adminurl->redirect('admin.plugin.' . My::id(), [], '#packman-repository-' . $type);
+                    dcCore::app()->adminurl?->redirect('admin.plugin.' . My::id(), [], '#packman-repository-' . $type);
                 }
 
             # Install
@@ -203,7 +203,7 @@ class Manage extends dcNsProcess
                 if (!empty($_POST['redir'])) {
                     http::redirect($_POST['redir']);
                 } else {
-                    dcCore::app()->adminurl->redirect('admin.plugin.' . My::id(), [], '#packman-repository-' . $type);
+                    dcCore::app()->adminurl?->redirect('admin.plugin.' . My::id(), [], '#packman-repository-' . $type);
                 }
 
             # Copy
@@ -229,7 +229,7 @@ class Manage extends dcNsProcess
                 if (!empty($_POST['redir'])) {
                     http::redirect($_POST['redir']);
                 } else {
-                    dcCore::app()->adminurl->redirect('admin.plugin.' . My::id(), [], '#packman-repository-' . $type);
+                    dcCore::app()->adminurl?->redirect('admin.plugin.' . My::id(), [], '#packman-repository-' . $type);
                 }
 
             # Move
@@ -256,7 +256,7 @@ class Manage extends dcNsProcess
                 if (!empty($_POST['redir'])) {
                     http::redirect($_POST['redir']);
                 } else {
-                    dcCore::app()->adminurl->redirect('admin.plugin.' . My::id(), [], '#packman-repository-' . $type);
+                    dcCore::app()->adminurl?->redirect('admin.plugin.' . My::id(), [], '#packman-repository-' . $type);
                 }
             }
         } catch (Exception $e) {
@@ -302,7 +302,7 @@ class Manage extends dcNsProcess
         if (dcCore::app()->error->flag() || !$is_configured) {
             echo
             '<div class="warning">' . __('pacKman is not well configured.') . ' ' .
-            '<a href="' . dcCore::app()->adminurl->get('admin.plugins', ['module' => My::id(), 'conf' => '1', 'redir' => dcCore::app()->adminurl->get('admin.plugin.' . My::id())]) . '">' . __('Configuration') . '</a>' .
+            '<a href="' . dcCore::app()->adminurl?->get('admin.plugins', ['module' => My::id(), 'conf' => '1', 'redir' => dcCore::app()->adminurl->get('admin.plugin.' . My::id())]) . '">' . __('Configuration') . '</a>' .
             '</div>';
         } else {
             Utils::modules(
diff --git a/src/Settings.php b/src/Settings.php
index 5b212b1..1354717 100644
--- a/src/Settings.php
+++ b/src/Settings.php
@@ -47,16 +47,16 @@ class Settings
      */
     public function __construct()
     {
-        $s = dcCore::app()->blog->settings->get(My::id());
+        $s = dcCore::app()->blog?->settings->get(My::id());
 
-        $this->pack_nocomment      = (bool) ($s->get('pack_nocomment') ?? false);
-        $this->pack_fixnewline     = (bool) ($s->get('pack_fixnewline') ?? false);
-        $this->pack_overwrite      = (bool) ($s->get('pack_overwrite') ?? false);
-        $this->pack_filename       = (string) ($s->get('pack_filename') ?? '%type%-%id%');
-        $this->secondpack_filename = (string) ($s->get('secondpack_filename') ?? '%type%-%id%-%version%');
-        $this->pack_repository     = (string) ($s->get('pack_repository') ?? '');
-        $this->pack_excludefiles   = (string) ($s->get('pack_excludefiles') ?? '*.zip,*.tar,*.tar.gz,.directory,.hg');
-        $this->hide_distrib        = (bool) ($s->get('hide_distrib') ?? false);
+        $this->pack_nocomment      = (bool) ($s?->get('pack_nocomment') ?? false);
+        $this->pack_fixnewline     = (bool) ($s?->get('pack_fixnewline') ?? false);
+        $this->pack_overwrite      = (bool) ($s?->get('pack_overwrite') ?? false);
+        $this->pack_filename       = (string) ($s?->get('pack_filename') ?? '%type%-%id%');
+        $this->secondpack_filename = (string) ($s?->get('secondpack_filename') ?? '%type%-%id%-%version%');
+        $this->pack_repository     = (string) ($s?->get('pack_repository') ?? '');
+        $this->pack_excludefiles   = (string) ($s?->get('pack_excludefiles') ?? '*.zip,*.tar,*.tar.gz,.directory,.hg');
+        $this->hide_distrib        = (bool) ($s?->get('hide_distrib') ?? false);
     }
 
     public function getSetting(string $key): mixed
@@ -75,8 +75,8 @@ 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/Utils.php b/src/Utils.php
index 3b788ae..af23955 100644
--- a/src/Utils.php
+++ b/src/Utils.php
@@ -38,7 +38,7 @@ class Utils
 
     public static function getThemesPath(): string
     {
-        return dcCore::app()->blog->themes_path;
+        return (string) dcCore::app()->blog?->themes_path;
     }
 
     public static function is_configured(string $repo, string $file_a, string $file_b): bool
@@ -101,7 +101,7 @@ class Utils
                 }
 
                 break;
-            case self::USE_LEGACY:
+            case Unzip::USE_LEGACY:
 
                 break;
         }
@@ -130,7 +130,7 @@ class Utils
                 }
 
                 break;
-            case self::USE_LEGACY:
+            case Unzip::USE_LEGACY:
 
                 break;
         }
@@ -152,7 +152,7 @@ class Utils
         return $dir;
     }
 
-    public static function getModules(string $type, ?string $id = null): ?array
+    public static function getModules(string $type, ?string $id = null): array
     {
         $type = $type == 'themes' ? 'themes' : 'plugins';
 
@@ -168,14 +168,14 @@ class Utils
             return $modules[$id];
         }
 
-        return null;
+        return [];
     }
 
     public static function moduleExists(string $type, ?string $id): bool
     {
         $type = $type == 'themes' ? 'themes' : 'plugins';
 
-        return array_key_exists($id, array_merge(dcCore::app()->{$type}->getDisabledModules(), dcCore::app()->{$type}->getModules()));
+        return array_key_exists((string) $id, array_merge(dcCore::app()->{$type}->getDisabledModules(), dcCore::app()->{$type}->getModules()));
     }
 
     public static function modules(array $modules, string $type, string $title): ?bool
@@ -306,7 +306,7 @@ class Utils
             '</td>' .
             '<td class="nowrap">' .
                 '<a class="packman-download" href="' .
-                dcCore::app()->adminurl->get('admin.plugin.' . My::id(), [
+                dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), [
                     'package' => basename($module['root']),
                     'repo'    => $type,
                 ]) . '" title="' . __('Download') . '">' .