Fatal error: Uncaught Error: Interface "League\OAuth1\Client\Credentials\CredentialsInterface" not found in C:\xampp\htdocs\mflux\vendor\league\oauth1-client\src\Credentials\ClientCredentialsInterface.php:5 Stack trace: #0 {main} thrown in C:\xampp\htdocs\mflux\vendor\league\oauth1-client\src\Credentials\ClientCredentialsInterface.php on line 5