Fatal error: Uncaught Error: Class "League\OAuth1\Client\Credentials\ClientCredentials" not found in C:\WebServer\htdocs\bookshelf\vendor\league\oauth1-client\src\Credentials\RsaClientCredentials.php:7 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\league\oauth1-client\src\Credentials\RsaClientCredentials.php on line 7