https://relaunch.pdir.de/docs/en/contao/extensions/mobilede/requirements/Note The vehicle manager is compatible with Contao 4.9 or higher. Contao 4 Contao 4 requires a web server such as Apache or NGINX with PHP and MySQL support. The vehicle manager requires Contao 4.9 or higher and PHP 7.2. Tip We recommend Contao 4.13 with PHP 8.1 or higher.Hugoen-US