Fatal error: Uncaught Error: Call to undefined function pcntl_signal() in /home/edmedu/www/edmeducation.co.kr/tw-dev/vendor/symfony/process/Tests/NonStopableProcess.php:36 Stack trace: #0 {main} thrown in /home/edmedu/www/edmeducation.co.kr/tw-dev/vendor/symfony/process/Tests/NonStopableProcess.php on line 36