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