Fatal error: Uncaught Error: Class "League\OAuth2\Client\Provider\Exception\IdentityProviderException" not found in /opt/lampp/htdocs/forum/flarum/vendor/omines/oauth2-gitlab/src/Provider/Exception/GitlabIdentityProviderException.php:21 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/omines/oauth2-gitlab/src/Provider/Exception/GitlabIdentityProviderException.php on line 21