Fatal error: Uncaught Error: Class "Flarum\Api\Controller\AbstractListController" not found in /opt/lampp/htdocs/forum/flarum/vendor/fof/oauth/src/Api/Controllers/ListProvidersController.php:26 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/fof/oauth/src/Api/Controllers/ListProvidersController.php on line 26