Fatal error: Uncaught Error: Interface 'Google\ApiCore\HeaderCredentialsInterface' not found in /home/thothstream/public_html/video/composer/vendor/google/gax/src/ApiKeyHeaderCredentials.php:39 Stack trace: #0 {main} thrown in /home/thothstream/public_html/video/composer/vendor/google/gax/src/ApiKeyHeaderCredentials.php on line 39