Ok thanks, will check it.
Exactly which file should i edit?
I found it, sorry. 
@mcll said:
Okay i FOUND the problem!!!I was thinking about the whole problem, and for me it seems to be a networking problem, maybe a routing problem. Last year autumn i had to setup a prerouting for a special reason. But the prerouting was only for a specific port:
34002, which is normally not affected to PMS.Here the routing what it was before:
I removed this routing, so now no routing at all:
And than i tried the match function, and its WORKING now!!!
So, i don’t know for the first, why it was affecting the PMS, but have to search another way for that prerouting.
Happy:
Same problem here. But I can’t disable port forwarding and nat sharing - cause using server with Plex as WIFI Access Point. Any ideas how to save nat and get “fix incorrect match” working?

The problem solved for those installing Plex plugin on FreeNAS. You have to configure the jail with a virtual network. Immediately fixed the problem while everything else I tried on this post either didn’t work or failed.
You save my life! tks a lot…
My Plex suddenly stopped working, installed it again to a new jail fine but then had the issue the original poster had with Match just showing was result as blank.
Followed this vid and it’s all working 
