Hey there,
the problem was already solved but I can not replicate the solution and can not ask inside the last thread, because it is already closed.
http://stackideas.com/forums/nik-comments-to-ed4-stream-entries-sync-to-posts-inside-ed4
Arlex Wong replied on Wednesday, July 13 2016, 07:46 PM
I have help you re-save the discuss app setting, it should work fine now.
Can you give it check?
I updated the whole fields/user/discuss folder to my live site but it seems like whatever you did was not inside this folder.

Could you please do it again on my live site please?