Warning: Undefined variable $isAdminArea in D:\htdocs\www\RepairWebApp\partials\page_end.php on line 3

Fatal error: Uncaught Error: Undefined constant "APP_BASE_URL" in D:\htdocs\www\RepairWebApp\partials\bottom_nav.php:5 Stack trace: #0 D:\htdocs\www\RepairWebApp\partials\page_end.php(3): include() #1 {main} thrown in D:\htdocs\www\RepairWebApp\partials\bottom_nav.php on line 5