Fatal error

Uncaught exception: 'ErrorException'

Message: 'Undefined offset: 0'

Stack trace:

#0 /var/www/iihmrdelhi.edu.in/App/Controllers/Category.php(120): Core\Error::errorHandler()
#1 [internal function]: App\Controllers\Category->indexAction()
#2 /var/www/iihmrdelhi.edu.in/Core/MainController.php(27): call_user_func_array()
#3 /var/www/iihmrdelhi.edu.in/Core/Router.php(88): Core\MainController->__call()
#4 /var/www/iihmrdelhi.edu.in/public/index.php(145): Core\Router->dispatch()
#5 {main}

Thrown in '/var/www/iihmrdelhi.edu.in/App/Controllers/Category.php' on line 120