Fatal error: Uncaught Error: Class 'League\OAuth2\Server\Grant\AbstractGrant' not found in /mnt/volume_lon1_01/backend/admin/vendor/league/oauth2-server/src/Grant/ClientCredentialsGrant.php:23
Stack trace:
#0 {main}
thrown in /mnt/volume_lon1_01/backend/admin/vendor/league/oauth2-server/src/Grant/ClientCredentialsGrant.php on line 23