Application error: called handler method exception 'NotFoundException' with message 'The requested file was not found' in /var/www/html/lib/Cake/Network/CakeResponse.php:1356
Stack trace:
#0 /var/www/html/lib/Cake/View/MediaView.php(91): CakeResponse->file('er', Array)
#1 /var/www/html/lib/Cake/Controller/Controller.php(959): MediaView->render(NULL, NULL)
#2 /var/www/html/lib/Cake/Routing/Dispatcher.php(200): Controller->render()
#3 /var/www/html/lib/Cake/Routing/Dispatcher.php(167): Dispatcher->_invoke(Object(BooksController), Object(CakeRequest))
#4 /var/www/html/app/webroot/index.php(118): Dispatcher->dispatch(Object(CakeRequest), Object(CakeResponse))
#5 {main}