i've updated my site from 1.1.3 to 1.2 and now i've encountered a couple of errors in a custom addon someone made for me.
The main errors are like "Undefined index: XenForo_NewsFeedHandler_DiscussionMessage_ProfilePost". What does it mean? Is it possible to just define an index?
I'm not an expert in development but i have some basic skills, so i know what i'm doing.
Thanks for your help