User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-184612-20141126020903

Looks like there is another patch to attempt to remove hacked quests again. If you get an error when attempting to play online, it's probably because you need to download version 1.2 from the eShop, which is available now.

http://www.capcom.co.jp/support/faq/information_info2014_0038167.html