Fatal error: Uncaught Error: Class 'League\OAuth2\Server\Exception\OAuthServerException' not found in C:\xampp\htdocs\finance\vendor\league\oauth2-server\src\Exception\UniqueTokenIdentifierConstraintViolationException.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\finance\vendor\league\oauth2-server\src\Exception\UniqueTokenIdentifierConstraintViolationException.php on line 12