Fatal error: Uncaught Error: Class 'League\OAuth2\Server\AbstractServer' not found in /home/rijschoolmk/xibo.rijschool-mk.be/vendor/league/oauth2-server/src/AuthorizationServer.php:20 Stack trace: #0 {main} thrown in /home/rijschoolmk/xibo.rijschool-mk.be/vendor/league/oauth2-server/src/AuthorizationServer.php on line 20