Fatal error: Uncaught Error: Call to undefined function imagecreatetruecolor() in /var/task/user/contact.php:319 Stack trace: #0 /var/task/user/contact.php(22): generateCaptchaImage() #1 /var/task/user/api/index.php(95): require('/var/task/user/...') #2 {main} thrown in /var/task/user/contact.php on line 319