Fatal error: Uncaught Error: Class "mikehaertl\shellcommand\Command" not found in /home/colih/public_html/dev/vendor/mikehaertl/php-pdftk/src/Command.php:15 Stack trace: #0 {main} thrown in /home/colih/public_html/dev/vendor/mikehaertl/php-pdftk/src/Command.php on line 15