Fatal error: Uncaught Error: Interface "Psr\Http\Client\ClientExceptionInterface" not found in I:\www\oauth2\auth_server\vendor\guzzlehttp\guzzle\src\Exception\GuzzleException.php:7 Stack trace: #0 {main} thrown in I:\www\oauth2\auth_server\vendor\guzzlehttp\guzzle\src\Exception\GuzzleException.php on line 7