Fatal error: Uncaught Error: Interface "Symfony\Component\Console\Completion\Output\CompletionOutputInterface" not found in /home/zdpktgd/ptc/vendor.old/symfony/console/Completion/Output/FishCompletionOutput.php:20 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/console/Completion/Output/FishCompletionOutput.php on line 20