Fatal error: Uncaught Error: Class 'League\OAuth2\Client\Grant\AbstractGrant' not found in C:\xampp7\htdocs\edgpens\vendor\league\oauth2-client\src\Grant\ClientCredentials.php:22 Stack trace: #0 {main} thrown in C:\xampp7\htdocs\edgpens\vendor\league\oauth2-client\src\Grant\ClientCredentials.php on line 22