module manager

kernel/AdminController.php

@@ -10,7 +10,7 @@ class AdminController extends Controller
 {
     protected AdminThemeService $adminThemeService;
 
-    protected function init()
+    protected function init(): void
     {
         $this->adminThemeService = new AdminThemeService();
         $active_theme = $this->adminThemeService->getActiveAdminThemeInfo();