Fatal error: Uncaught Error: Class "craft\helpers\App" not found in /home/telefonai/public_html/test.telefonai.eu/starter-next/backend/config/app.web.php:11 Stack trace: #0 {main} thrown in /home/telefonai/public_html/test.telefonai.eu/starter-next/backend/config/app.web.php on line 11