Fatal error: Uncaught Error: Class "Concrete\Core\File\Command\FileCommand" not found in /home/elcrestweb/public_html/concrete/src/File/Command/GenerateCustomThumbnailAsyncCommand.php:5 Stack trace: #0 {main} thrown in /home/elcrestweb/public_html/concrete/src/File/Command/GenerateCustomThumbnailAsyncCommand.php on line 5