Fatal error: Uncaught Error: Class 'League\OAuth2\Server\Grant\AbstractAuthorizeGrant' not found in C:\Apache24\htdocs\vendor.old\league\oauth2-server\src\Grant\ImplicitGrant.php:23 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor.old\league\oauth2-server\src\Grant\ImplicitGrant.php on line 23