Fatal error: Uncaught TypeError: Unsupported operand types: string - int in /app/www/information_pages/feedback.php:11 Stack trace: #0 /app/www/router.php(42): require() #1 [internal function]: {closure}('') #2 /app/vendor/bramus/router/src/Bramus/Router/Router.php(458): call_user_func_array(Object(Closure), Array) #3 /app/vendor/bramus/router/src/Bramus/Router/Router.php(440): Bramus\Router\Router->invoke(Object(Closure), Array) #4 /app/vendor/bramus/router/src/Bramus/Router/Router.php(287): Bramus\Router\Router->handle(Array, true) #5 /app/www/router.php(939): Bramus\Router\Router->run() #6 {main} thrown in /app/www/information_pages/feedback.php on line 11