Notice: Undefined variable: app in C:\xampp\htdocs\xibo\lib\routes-install.php on line 30

Fatal error: Uncaught Error: Call to a member function get() on null in C:\xampp\htdocs\xibo\lib\routes-install.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\xibo\lib\routes-install.php on line 30