Fatal error: Uncaught Error: Class 'Google\Cloud\Core\Upload\AbstractUploader' not found in /home/thothstream/public_html/video/composer/vendor/google/cloud-core/src/Upload/ResumableUploader.php:33 Stack trace: #0 {main} thrown in /home/thothstream/public_html/video/composer/vendor/google/cloud-core/src/Upload/ResumableUploader.php on line 33