Fatal error: Uncaught Error: Interface "Google\Auth\ExternalAccountCredentialSourceInterface" not found in I:\www\pvcCloud\vendor\google\auth\src\CredentialSource\AwsNativeSource.php:28 Stack trace: #0 {main} thrown in I:\www\pvcCloud\vendor\google\auth\src\CredentialSource\AwsNativeSource.php on line 28