Fatal error: Uncaught Error: Call to undefined function pcntl_signal() in /opt/lampp/htdocs/myhospitalnow/mhn-hospital-ms/vendorback/symfony/process/Tests/SignalListener.php:12 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/myhospitalnow/mhn-hospital-ms/vendorback/symfony/process/Tests/SignalListener.php on line 12