Fatal error: Uncaught Error: Undefined constant "ROOTPATH" in /home/urmitech/public_html/chatting-app/app/Config/Constants.php:26 Stack trace: #0 /home/urmitech/public_html/chatting-app/list_users.php(3): require() #1 {main} thrown in /home/urmitech/public_html/chatting-app/app/Config/Constants.php on line 26