diff --git a/src/Action.php b/src/Action.php
index 5780b94..a6ed7ac 100644
--- a/src/Action.php
+++ b/src/Action.php
@@ -82,7 +82,7 @@ abstract class Action
         $this->class_name = str_replace(__NAMESPACE__ . '\\Module\\', '', get_called_class());
         $this->module     = new dcModuleDefine('undefined');
 
-        $settings = dcCore::app()->blog->settings->get(My::id())->get('settings_' . $this->class_name);
+        $settings = dcCore::app()->blog?->settings->get(My::id())->get('settings_' . $this->class_name);
         if (null != $settings) {
             $settings = json_decode($settings, true);
         }
@@ -91,7 +91,7 @@ abstract class Action
         $this->init();
 
         // can overload priority by settings
-        if (1 < ($p = (int) dcCore::app()->blog->settings->get(My::id())->get('priority_' . $this->class_name))) {
+        if (1 < ($p = (int) dcCore::app()->blog?->settings->get(My::id())->get('priority_' . $this->class_name))) {
             $this->priority = $p;
         }
     }
@@ -232,16 +232,18 @@ abstract class Action
      */
     final protected function redirect(string $url): bool
     {
-        dcCore::app()->blog->settings->get(My::id())->put(
-            'settings_' . $this->class_name,
-            json_encode($this->settings),
-            'string',
-            null,
-            true,
-            true
-        );
-        dcCore::app()->blog->triggerBlog();
-        dcPage::addSuccessNotice(__('Configuration successfully updated'));
+        if (!is_null(dcCore::app()->blog)) {
+            dcCore::app()->blog->settings->get(My::id())->put(
+                'settings_' . $this->class_name,
+                json_encode($this->settings),
+                'string',
+                null,
+                true,
+                true
+            );
+            dcCore::app()->blog->triggerBlog();
+            dcPage::addSuccessNotice(__('Configuration successfully updated'));
+        }
         Http::redirect($url);
 
         return true;
diff --git a/src/Backend.php b/src/Backend.php
index c60f309..c85b8e2 100644
--- a/src/Backend.php
+++ b/src/Backend.php
@@ -31,6 +31,7 @@ class Backend extends dcNsProcess
     public static function init(): bool
     {
         static::$init = defined('DC_CONTEXT_ADMIN')
+            && !is_null(dcCore::app()->auth)
             && dcCore::app()->auth->isSuperAdmin()
             && My::phpCompliant();
 
@@ -43,18 +44,9 @@ class Backend extends dcNsProcess
             return false;
         }
 
-        dcCore::app()->addBehavior('adminDashboardFavoritesV2', function (dcFavorites $favs): void {
-            $favs->register(
-                My::id(),
-                [
-                    'title'      => My::name(),
-                    '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' => null,
-                ]
-            );
-        });
+        if (is_null(dcCore::app()->auth) || is_null(dcCore::app()->blog) || is_null(dcCore::app()->adminurl)) {
+            return false;
+        }
 
         dcCore::app()->menu[dcAdmin::MENU_PLUGINS]->addItem(
             My::name(),
@@ -64,6 +56,19 @@ class Backend extends dcNsProcess
             dcCore::app()->auth->isSuperAdmin()
         );
 
+        dcCore::app()->addBehavior('adminDashboardFavoritesV2', function (dcFavorites $favs): void {
+            $favs->register(
+                My::id(),
+                [
+                    'title'      => My::name(),
+                    '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' => null,
+                ]
+            );
+        });
+
         $dir = __DIR__ . DIRECTORY_SEPARATOR . 'module' . DIRECTORY_SEPARATOR;
         $ns  = __NAMESPACE__ . '\\Module\\';
 
diff --git a/src/Config.php b/src/Config.php
index b0b3999..becdf42 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -39,6 +39,7 @@ class Config extends dcNsProcess
     public static function init(): bool
     {
         static::$init = defined('DC_CONTEXT_ADMIN')
+            && !is_null(dcCore::app()->auth)
             && dcCore::app()->auth->isSuperAdmin()
             && My::phpCompliant();
 
@@ -55,6 +56,10 @@ class Config extends dcNsProcess
             return true;
         }
 
+        if (is_null(dcCore::app()->blog) || is_null(dcCore::app()->adminurl)) {
+            return false;
+        }
+
         try {
             $pdisabled = '';
             if (!empty($_POST['disabled']) && is_array($_POST['disabled'])) {
@@ -84,8 +89,13 @@ class Config extends dcNsProcess
             return;
         }
 
-        $improve = new Core();
-        $modules = $items = [];
+        if (is_null(dcCore::app()->blog) || is_null(dcCore::app()->adminurl)) {
+            return;
+        }
+
+        $improve  = new Core();
+        $modules  = $items = [];
+        $settings = dcCore::app()->blog->settings->get(My::id());
 
         foreach ($improve->modules() as $action) {
             $modules[$action->name()] = $action->id();
@@ -103,16 +113,16 @@ class Config extends dcNsProcess
             (new Fieldset())->class('fieldset')->legend(new Legend(__('List of disabled actions')))->fields($items),
             (new Fieldset())->class('fieldset')->legend(new Legend(__('Options')))->fields([
                 (new Para())->items([
-                    (new Checkbox('nodetails', (bool) dcCore::app()->blog->settings->get(My::id())->get('nodetails')))->value('1'),
+                    (new Checkbox('nodetails', (bool) $settings->get('nodetails')))->value('1'),
                     (new Label(__('Hide details of rendered actions'), Label::OUTSIDE_LABEL_AFTER))->class('classic')->for('nodetails'),
                 ]),
                 (new Para())->items([
-                    (new Checkbox('allow_distrib', (bool) dcCore::app()->blog->settings->get(My::id())->get('allow_distrib')))->value('1'),
+                    (new Checkbox('allow_distrib', (bool) $settings->get('allow_distrib')))->value('1'),
                     (new Label(__('Show dotclear distributed modules'), Label::OUTSIDE_LABEL_AFTER))->class('classic')->for('allow_distrib'),
                 ]),
                 (new Para())->items([
                     (new Label(__('Sort modules seletion by:'), Label::OUTSIDE_LABEL_BEFORE))->for('combosortby'),
-                    (new Select('combosortby'))->items([__('Name') => 'name', __('Id') => 'id'])->default(dcCore::app()->blog->settings->get(My::id())->get('combosortby')),
+                    (new Select('combosortby'))->items([__('Name') => 'name', __('Id') => 'id'])->default($settings->get('combosortby')),
                 ]),
             ]),
         ])->render();
diff --git a/src/Core.php b/src/Core.php
index 3831a19..bcf2678 100644
--- a/src/Core.php
+++ b/src/Core.php
@@ -51,7 +51,7 @@ class Core
      */
     public function __construct()
     {
-        $disabled = explode(';', (string) dcCore::app()->blog->settings->get(My::id())->get('disabled'));
+        $disabled = explode(';', (string) dcCore::app()->blog?->settings->get(My::id())->get('disabled'));
         $list     = new ArrayObject();
 
         try {
@@ -307,11 +307,6 @@ class Core
         return $res;
     }
 
-    public function getURL(array $params = []): string
-    {
-        return dcCore::app()->adminurl->get('admin.plugin.' . My::id(), $params, '&');
-    }
-
     /**
      * Check and clean file extension
      *
diff --git a/src/Install.php b/src/Install.php
index 2ac5887..7d07d9c 100644
--- a/src/Install.php
+++ b/src/Install.php
@@ -66,7 +66,7 @@ class Install extends dcNsProcess
     private static function putSettings(): void
     {
         foreach (self::$default_settings as $v) {
-            dcCore::app()->blog->settings->get(My::id())->put(
+            dcCore::app()->blog?->settings->get(My::id())->put(
                 $v[0],
                 $v[2],
                 $v[3],
@@ -80,7 +80,7 @@ class Install extends dcNsProcess
     /** Update improve < 0.8 : action modules settings name */
     private static function update_0_8_0(): void
     {
-        if (version_compare(dcCore::app()->getVersion(My::id()) ?? '0', '0.8', '<')) {
+        if (!is_null(dcCore::app()->blog) && version_compare(dcCore::app()->getVersion(My::id()) ?? '0', '0.8', '<')) {
             foreach (dcCore::app()->blog->settings->get(My::id())->dumpGlobalSettings() as $id => $values) {
                 $newId = str_replace('ImproveAction', '', $id);
                 if ($id != $newId) {
diff --git a/src/Manage.php b/src/Manage.php
index d335e41..18254b1 100644
--- a/src/Manage.php
+++ b/src/Manage.php
@@ -51,11 +51,10 @@ class Manage extends dcNsProcess
     /** @var Action|null $action Current action module */
     private static $action = null;
 
-    protected static $init = false;
-
     public static function init(): bool
     {
         static::$init = defined('DC_CONTEXT_ADMIN')
+            && !is_null(dcCore::app()->auth)
             && dcCore::app()->auth->isSuperAdmin()
             && My::phpCompliant();
 
@@ -86,7 +85,7 @@ class Manage extends dcNsProcess
     {
         try {
             if (!empty(self::$type)) {
-                $preferences = dcCore::app()->blog->settings->get(My::id())->get('preferences');
+                $preferences = dcCore::app()->blog?->settings->get(My::id())->get('preferences');
                 if (is_string($preferences)) {
                     $preferences = json_decode($preferences, true);
                     if (is_array($preferences)) {
@@ -102,7 +101,7 @@ class Manage extends dcNsProcess
 
     private static function setPreferences(): bool
     {
-        if (!empty($_POST['save_preferences'])) {
+        if (!empty($_POST['save_preferences']) && !is_null(dcCore::app()->blog)) {
             $preferences              = self::getPreference(true);
             $preferences[self::$type] = [];
             if (!empty($_POST['actions'])) {
@@ -123,6 +122,10 @@ class Manage extends dcNsProcess
 
     private static function comboModules(): array
     {
+        if (is_null(dcCore::app()->blog)) {
+            return [];
+        }
+
         if (!(dcCore::app()->themes instanceof dcThemes)) {
             dcCore::app()->themes = new dcThemes();
             dcCore::app()->themes->loadModules(dcCore::app()->blog->themes_path, null);
@@ -175,7 +178,7 @@ class Manage extends dcNsProcess
                         $_POST['actions']
                     );
                     $log_id = self::$improve->writeLogs();
-                    dcCore::app()->blog->triggerBlog();
+                    dcCore::app()->blog?->triggerBlog();
 
                     if (self::$improve->hasLog('error')) {
                         $notice = ['type' => dcAdminNotices::NOTICE_ERROR, 'msg' => __('Fix of "%s" complete in %s secondes with errors')];
@@ -197,7 +200,7 @@ class Manage extends dcNsProcess
         }
 
         if ($done) {
-            dcCore::app()->adminurl->redirect('admin.plugin.' . My::id(), ['type' => self::$type, 'module' => self::$module, 'upd' => $log_id]);
+            dcCore::app()->adminurl?->redirect('admin.plugin.' . My::id(), ['type' => self::$type, 'module' => self::$module, 'upd' => $log_id]);
         }
 
         return true;
@@ -234,14 +237,14 @@ class Manage extends dcNsProcess
 
     private static function displayConfigurator(): void
     {
-        $back_url = $_REQUEST['redir'] ?? dcCore::app()->adminurl->get('admin.plugin.' . My::id(), ['type' => self::$type]);
+        $back_url = $_REQUEST['redir'] ?? dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), ['type' => self::$type]);
 
         if (null === self::$action) {
             echo '
             <p class="warning">' . __('Unknow module') . '</p>
             <p><a class="back" href="' . $back_url . '">' . __('Back') . '</a></p>';
         } else {
-            $redir = $_REQUEST['redir'] ?? dcCore::app()->adminurl->get('admin.plugin.' . My::id(), ['type' => self::$type, 'config' => self::$action->id()]);
+            $redir = $_REQUEST['redir'] ?? dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), ['type' => self::$type, 'config' => self::$action->id()]);
             $res   = self::$action->configure($redir);
 
             echo '
@@ -249,7 +252,7 @@ class Manage extends dcNsProcess
             <p><a class="back" href="' . $back_url . '">' . __('Back') . '</a></p>
             <h4>' . Html::escapeHTML(self::$action->description()) . '</h4>' .
 
-            (new Form('form-actions'))->method('post')->action(dcCore::app()->adminurl->get('admin.plugin.' . My::id()))->fields([
+            (new Form('form-actions'))->method('post')->action(dcCore::app()->adminurl?->get('admin.plugin.' . My::id()))->fields([
                 empty($res) ? (new Text('p', __('Nothing to configure')))->class('message') : (new Text('', $res)),
                 (new Para())->class('clear')->items([
                     (new Submit(['save']))->value(__('Save')),
@@ -265,7 +268,7 @@ class Manage extends dcNsProcess
     private static function displayActions(): void
     {
         echo
-        (new Form('improve_menu'))->method('get')->action(dcCore::app()->adminurl->get('admin.plugin.' . My::id()))->fields([
+        (new Form('improve_menu'))->method('get')->action(dcCore::app()->adminurl?->get('admin.plugin.' . My::id()))->fields([
             (new Para())->class('anchor-nav')->items([
                 (new Label(__('Goto:'), Label::OUTSIDE_LABEL_BEFORE))->for('type')->class('classic'),
                 (new Select('type'))->default(self::$type)->items([__('Plugins') => 'plugin', __('Themes') => 'theme']),
@@ -278,7 +281,7 @@ class Manage extends dcNsProcess
         if (count($combo_modules) == 1) {
             echo '<p class="message">' . __('No module to manage') . '</p>';
         } else {
-            echo '<form action="' . dcCore::app()->adminurl->get('admin.plugin.' . My::id()) . '" method="post" id="form-actions">' .
+            echo '<form action="' . dcCore::app()->adminurl?->get('admin.plugin.' . My::id()) . '" method="post" id="form-actions">' .
             '<table><caption class="hidden">' . __('Actions') . '</caption><thead><tr>' .
             '<th colspan="2" class="first">' . __('Action') . '</td>' .
             '<th scope="col">' . __('Description') . '</td>' .
@@ -303,7 +306,7 @@ class Manage extends dcNsProcess
                 '<td class="maximal">' . $action->description() . '</td>' .
                 '<td class="minimal nowrap modules">' . (
                     false === $action->configurator() ? '' :
-                        '<a class="module-config" href="' . dcCore::app()->adminurl->get('admin.plugin.' . My::id(), ['type' => self::$type, 'config' => $action->id()]) .
+                        '<a class="module-config" href="' . dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), ['type' => self::$type, 'config' => $action->id()]) .
                         '" title="' . sprintf(__("Configure action '%s'"), $action->name()) . '">' . __('Configure') . '</a>'
                 ) . '</td>' .
                 (DC_DEBUG ? '<td class="minimal"><span class="debug">' . $action->priority() . '</span></td>' : '') . /* @phpstan-ignore-line */
@@ -327,7 +330,7 @@ class Manage extends dcNsProcess
             '<br class="clear" />
             </form>';
 
-            if (!empty($_REQUEST['upd']) && !dcCore::app()->blog->settings->get(My::id())->get('nodetails')) {
+            if (!empty($_REQUEST['upd']) && !dcCore::app()->blog?->settings->get(My::id())->get('nodetails')) {
                 $logs = self::$improve->parseLogs((int) $_REQUEST['upd']);
 
                 if (!empty($logs)) {
diff --git a/src/My.php b/src/My.php
index b7b4780..be84901 100644
--- a/src/My.php
+++ b/src/My.php
@@ -22,7 +22,7 @@ use dcCore;
 class My
 {
     /** @var string Required php version */
-    public const PHP_MIN = '8.0';
+    public const PHP_MIN = '8.1';
 
     /**
      * This module id
diff --git a/src/module/cssheader.php b/src/module/cssheader.php
index ae19627..61818b9 100644
--- a/src/module/cssheader.php
+++ b/src/module/cssheader.php
@@ -156,6 +156,12 @@ class cssheader extends Action
 
     public function openModule(): ?bool
     {
+        if (is_null(dcCore::app()->auth)) {
+            $this->setWarning(__('Auth is not set'));
+
+            return null;
+        }
+
         $bloc = trim($this->bloc_content);
 
         if (empty($bloc)) {
diff --git a/src/module/dcstore.php b/src/module/dcstore.php
index 0763596..a5482b8 100644
--- a/src/module/dcstore.php
+++ b/src/module/dcstore.php
@@ -109,31 +109,31 @@ class dcstore extends Action
         $rsp = new XmlTag('module');
 
         # id
-        $rsp->id = $this->module->getId();
+        $rsp->insertAttr('id', $this->module->getId());
 
         # name
         if (empty($this->module->get('name'))) {
             $this->setError(__('unknow module name'));
         }
-        $rsp->name($this->module->get('name'));
+        $rsp->insertNode(new XmlTag('name', $this->module->get('name')));
 
         # version
         if (empty($this->module->get('version'))) {
             $this->setError(__('unknow module version'));
         }
-        $rsp->version($this->module->get('version'));
+        $rsp->insertNode(new XmlTag('version', $this->module->get('version')));
 
         # author
         if (empty($this->module->get('author'))) {
             $this->setError(__('unknow module author'));
         }
-        $rsp->author($this->module->get('author'));
+        $rsp->insertNode(new XmlTag('author', $this->module->get('author')));
 
         # desc
         if (empty($this->module->get('desc'))) {
             $this->setError(__('unknow module description'));
         }
-        $rsp->desc($this->module->get('desc'));
+        $rsp->insertNode(new XmlTag('desc', $this->module->get('desc')));
 
         # repository
         if (empty($this->module->get('repository'))) {
@@ -145,7 +145,7 @@ class dcstore extends Action
         if (empty($file_pattern)) {
             $this->setError(__('no zip file pattern set in configuration'));
         }
-        $rsp->file($file_pattern);
+        $rsp->insertNode(new XmlTag('file', $file_pattern));
 
         # da dc_min or requires core
         if (!empty($this->module->get('requires')) && is_array($this->module->get('requires'))) {
diff --git a/src/module/phpcsfixer.php b/src/module/phpcsfixer.php
index 6404bf7..b3abd8f 100644
--- a/src/module/phpcsfixer.php
+++ b/src/module/phpcsfixer.php
@@ -72,9 +72,11 @@ class phpcsfixer extends Action
 
         $this->getPhpPath();
 
-        dcCore::app()->auth->user_prefs->addWorkspace('interface');
-        self::$user_ui_colorsyntax       = dcCore::app()->auth->user_prefs->get('interface')->get('colorsyntax');
-        self::$user_ui_colorsyntax_theme = dcCore::app()->auth->user_prefs->get('interface')->get('colorsyntax_theme');
+        if (null !== dcCore::app()->auth?->user_prefs) {
+            dcCore::app()->auth->user_prefs->addWorkspace('interface');
+            self::$user_ui_colorsyntax       = dcCore::app()->auth->user_prefs->get('interface')->get('colorsyntax');
+            self::$user_ui_colorsyntax_theme = dcCore::app()->auth->user_prefs->get('interface')->get('colorsyntax_theme');
+        }
 
         return true;
     }
diff --git a/src/module/phpheader.php b/src/module/phpheader.php
index f3f9d03..c850ca4 100644
--- a/src/module/phpheader.php
+++ b/src/module/phpheader.php
@@ -155,6 +155,12 @@ class phpheader extends Action
 
     public function openModule(): ?bool
     {
+        if (is_null(dcCore::app()->auth)) {
+            $this->setWarning(__('Auth is not set'));
+
+            return null;
+        }
+
         $bloc = trim($this->bloc_content);
 
         if (empty($bloc)) {
diff --git a/src/module/phpstan.php b/src/module/phpstan.php
index c24ab61..c5c8d7f 100644
--- a/src/module/phpstan.php
+++ b/src/module/phpstan.php
@@ -75,16 +75,18 @@ class phpstan extends Action
         $ignored_vars       = $this->getSetting('ignored_vars');
         $this->ignored_vars = is_string($ignored_vars) ? $ignored_vars : '';
 
-        dcCore::app()->auth->user_prefs->addWorkspace('interface');
-        self::$user_ui_colorsyntax       = dcCore::app()->auth->user_prefs->get('interface')->get('colorsyntax');
-        self::$user_ui_colorsyntax_theme = dcCore::app()->auth->user_prefs->get('interface')->get('colorsyntax_theme');
+        if (null !== dcCore::app()->auth?->user_prefs) {
+            dcCore::app()->auth->user_prefs->addWorkspace('interface');
+            self::$user_ui_colorsyntax       = dcCore::app()->auth->user_prefs->get('interface')->get('colorsyntax');
+            self::$user_ui_colorsyntax_theme = dcCore::app()->auth->user_prefs->get('interface')->get('colorsyntax_theme');
+        }
 
         return true;
     }
 
     public function isConfigured(): bool
     {
-        return !dcCore::app()->blog->settings->get(My::id())->get('nodetails');
+        return !dcCore::app()->blog?->settings->get(My::id())->get('nodetails');
     }
 
     public function header(): ?string
@@ -284,7 +286,7 @@ class phpstan extends Action
                 '%MODULE_ROOT%',
                 '%DC_ROOT%',
                 '%BOOTSTRAP_ROOT%',
-                '%SCAN_DIRECTORIES%'
+                '%SCAN_DIRECTORIES%',
             ],
             [
                 $this->run_level,
@@ -311,18 +313,19 @@ class phpstan extends Action
         return (bool) file_put_contents(DC_VAR . '/phpstan.neon', $content);
     }
 
-    private function getScanDirectories()
+    private function getScanDirectories(): string
     {
         $ret = '';
         if ($this->module->get('type') == 'plugin') {
             $paths = explode(PATH_SEPARATOR, DC_PLUGINS_ROOT);
-            foreach($paths as $path) {
+            foreach ($paths as $path) {
                 $path = Path::real($path, false);
                 if ($path !== false && $path != Path::real(DC_ROOT . DIRECTORY_SEPARATOR . 'plugins', false)) {
                     $ret .= '    - ' . $path . "\n";
                 }
             }
         }
+
         return $ret;
     }
 }
diff --git a/src/module/zip.php b/src/module/zip.php
index 9056075..ba2dd9d 100644
--- a/src/module/zip.php
+++ b/src/module/zip.php
@@ -121,7 +121,7 @@ class zip extends Action
                 ]),
                 (new Note())->text(sprintf(
                     __('Preconization: %s'),
-                    dcCore::app()->blog->public_path ?
+                    dcCore::app()->blog?->public_path ?
                     Path::real(dcCore::app()->blog->public_path) : __("Blog's public directory")
                 ))->class('form-note'),
             ]),
diff --git a/src/module/zip/Zip.php b/src/module/zip/Zip.php
index a281006..9e299be 100644
--- a/src/module/zip/Zip.php
+++ b/src/module/zip/Zip.php
@@ -26,6 +26,8 @@ class Zip extends \Dotclear\Helper\File\Zip\Zip
      * @param      string    $file   The file
      * @param      string    $size   The size
      * @param      int|null  $mtime  The mtime
+     *
+     * @return     void
      */
     protected function writeFile($name, $file, $size, $mtime)
     {