Fatal error: Uncaught Error: Class 'League\OAuth2\Server\Grant\AbstractGrant' not found in /var/www/microservices/vendor/league/oauth2-server/src/Grant/ClientCredentialsGrant.php:22 Stack trace: #0 {main} thrown in /var/www/microservices/vendor/league/oauth2-server/src/Grant/ClientCredentialsGrant.php on line 22