Core\PonghoException::Undefined index: photo

On file /mnt/md1/www/virtuali/www.rockanddoc.com/pongho/application/controllers/media.php at line 52

#0 /mnt/md1/www/virtuali/www.rockanddoc.com/pongho/application/controllers/media.php(52): Core\{closure}(8, 'Undefined index...', '/mnt/md1/www/vi...', 52, Array)
#1 /mnt/md1/www/virtuali/www.rockanddoc.com/pongho/system/action_controller/base.php(159): MediaController->set()
#2 /mnt/md1/www/virtuali/www.rockanddoc.com/pongho/system/core/pongho.php(174): ActionController\Base->run('set')
#3 /mnt/md1/www/virtuali/www.rockanddoc.com/pongho/system/bootstrap.php(33): Core\Pongho::run()
#4 /mnt/md1/www/virtuali/www.rockanddoc.com/index.php(109): include('/mnt/md1/www/vi...')
#5 {main}