Fatal error: Uncaught Error: Undefined constant "App\Controllers\APP_URL" in /home/wp552476/bic-erog.com/public_html/app/Controllers/FrontController.php:108 Stack trace: #0 [internal function]: App\Controllers\FrontController->productDetail('501012') #1 /home/wp552476/bic-erog.com/public_html/app/Core/Router.php(91): call_user_func_array(Array, Array) #2 /home/wp552476/bic-erog.com/public_html/index.php(53): App\Core\Router->dispatch('/products/50101...', 'GET') #3 {main} thrown in /home/wp552476/bic-erog.com/public_html/app/Controllers/FrontController.php on line 108