diff --git a/src/Backend.php b/src/Backend.php
index 3a2e295..7f6ea81 100644
--- a/src/Backend.php
+++ b/src/Backend.php
@@ -41,7 +41,7 @@ class Backend extends dcNsProcess
             'adminDashboardFavoritesV2' => function (dcFavorites $favs): void {
                 $favs->register(My::id(), [
                     'title'      => My::name(),
-                    'url'        => dcCore::app()->adminurl->get('admin.plugin.' . My::id()),
+                    'url'        => dcCore::app()->adminurl?->get('admin.plugin.' . My::id()),
                     'small-icon' => dcPage::getPF(My::id() . '/icon.svg'),
                     'large-icon' => dcPage::getPF(My::id() . '/icon.svg'),
                     //'permissions' => dcCore::app()->auth->isSuperAdmin(),
@@ -56,9 +56,9 @@ class Backend extends dcNsProcess
 
         dcCore::app()->menu[dcAdmin::MENU_PLUGINS]->addItem(
             My::name(),
-            dcCore::app()->adminurl->get('admin.plugin.' . My::id()),
+            dcCore::app()->adminurl?->get('admin.plugin.' . My::id()),
             dcPage::getPF(My::id() . '/icon.svg'),
-            preg_match('/' . preg_quote(dcCore::app()->adminurl->get('admin.plugin.' . My::id())) . '(&.*)?$/', $_SERVER['REQUEST_URI']),
+            preg_match('/' . preg_quote((string) dcCore::app()->adminurl?->get('admin.plugin.' . My::id())) . '(&.*)?$/', $_SERVER['REQUEST_URI']),
             dcCore::app()->auth?->isSuperAdmin()
         );
 
diff --git a/src/Manage.php b/src/Manage.php
index e7a29b4..be5f220 100644
--- a/src/Manage.php
+++ b/src/Manage.php
@@ -28,8 +28,8 @@ use Dotclear\Helper\Html\Form\{
     Text
 };
 use Dotclear\Helper\File\Path;
+use Dotclear\Helper\Network\Http;
 use Exception;
-use http;
 
 class Manage extends dcNsProcess
 {
@@ -79,7 +79,7 @@ class Manage extends dcNsProcess
             dcPage::addSuccessNotice(
                 __('License successfully added.')
             );
-            http::redirect(
+            Http::redirect(
                 empty($_POST['redir']) ?
                 dcCore::app()->admin->getPageURL() : $_POST['redir']
             );
@@ -212,7 +212,7 @@ class Manage extends dcNsProcess
     {
         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);
         }
 
         return [
diff --git a/src/Utils.php b/src/Utils.php
index 5500a8c..0cfcf93 100644
--- a/src/Utils.php
+++ b/src/Utils.php
@@ -34,6 +34,10 @@ class Utils
      */
     public static function addLicense(array $module): void
     {
+        if (is_null(dcCore::app()->auth)) {
+            return;
+        }
+
         $s = Settings::init();
 
         # --BEHAVIOR-- licenseBootstrapBeforeAddLicense
@@ -237,7 +241,7 @@ class Utils
      */
     protected static function replacePhpContent(string $content, string $license, bool $overwrite): string
     {
-        $clean = preg_replace(
+        $clean = (string) preg_replace(
             '/((# -- BEGIN LICENSE BLOCK ([-]+))(.*?)' .
             '(# -- END LICENSE BLOCK ([-]+))([\n|\r\n]+))/msi',
             '',
@@ -248,7 +252,7 @@ class Utils
             return $content;
         }
 
-        return preg_replace(
+        return (string) preg_replace(
             '/(\<\?php)/',
             '<?php' .
             "\r\n# -- BEGIN LICENSE BLOCK ----------------------------------\r\n" .