Fatal error: Uncaught Error: Undefined constant "DOMAIN_NAME" in /app/config/variables.php:17 Stack trace: #0 /app/core/includes/backend/headers/header-1.php(8): include() #1 /app/core/includes/frontend/headers/header-1.php(4): include('/app/core/inclu...') #2 /app/routes/view/post.php(3): include('/app/core/inclu...') #3 /app/libs/php/router/router.php(111): include_once('/app/routes/vie...') #4 /app/libs/php/router/router.php(20): route('/$post_type/$po...', '/routes/view/po...') #5 /app/index.php(89): get('/$post_type/$po...', '/routes/view/po...') #6 {main} thrown in /app/config/variables.php on line 17