Fatal error: Uncaught Error: Interface "League\OAuth2\Client\Provider\ResourceOwnerInterface" not found in C:\WebServer\htdocs\bookshelf\vendor\league\oauth2-client\src\Provider\GenericResourceOwner.php:20 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\league\oauth2-client\src\Provider\GenericResourceOwner.php on line 20