🚨 FATAL CRASH INTERCEPTED

Error: Uncaught Error: Undefined constant "NAV" in /home/nonstop/public_html/sources/Register.php:139 Stack trace: #0 /home/nonstop/public_html/sources/Register.php(27): Register->__construct() #1 /home/nonstop/public_html/index.php(427): require('/home/nonstop/p...') #2 {main} thrown

File: /home/nonstop/public_html/sources/Register.php

Line: 139