Fatal error: Uncaught Error: Class 'SebastianBergmann\Exporter\Exporter' not found in /home/thothstream/public_html/video/composer/vendor/google/gax/src/Testing/MessageAwareExporter.php:26 Stack trace: #0 {main} thrown in /home/thothstream/public_html/video/composer/vendor/google/gax/src/Testing/MessageAwareExporter.php on line 26