Fatal error: Uncaught Error: Interface 'Contao\ManagerPlugin\Bundle\BundlePluginInterface' not found in /home/eberhardschwarze/public_html/vendor/contao/manager-bundle/src/ContaoManager/Plugin.php:35 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao/manager-bundle/src/ContaoManager/Plugin.php on line 35