Fatal error: Uncaught Error: Interface "League\OAuth2\Client\Token\AccessTokenInterface" not found in /opt/lampp/htdocs/forum/flarum/vendor/league/oauth2-client/src/Token/ResourceOwnerAccessTokenInterface.php:17 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/league/oauth2-client/src/Token/ResourceOwnerAccessTokenInterface.php on line 17