Fatal error

Uncaught exception: 'ErrorException'

Message: 'Undefined index: product'

Stack trace:

#0 /var/www/html/shutbeats/App/Controllers/Tracks.php(64): Core\Error::errorHandler()
#1 [internal function]: App\Controllers\Tracks->trackAction()
#2 /var/www/html/shutbeats/Core/Controller.php(67): call_user_func_array()
#3 /var/www/html/shutbeats/Core/Router.php(121): Core\Controller->__call()
#4 /var/www/html/shutbeats/public/index.php(230): Core\Router->dispatch()
#5 {main}

Thrown in '/var/www/html/shutbeats/App/Controllers/Tracks.php' on line 64