It's not a critical error, so you can just ignore it.

Alright, but they're reall annoying conflicting.

I already downloaded and subscribed all 5 parts but the system said conflicting parts.
Why is this happen?

yeah i'm having same problem, also crashes online.

try to disable all other addons

I would download this Bloody Moors campaign from the GameMaps website if all the files are conflicting with each other. A few other campaigns on the Steam Workshop have that same problem.

most campaigns from the workshop conflict. theres nothing to worry about as it works just fine for me and everyone ive played with, even when other campaigns do it. im not sure as to why it happens, but it seems to have little to no bearing on gameplay.

It happens because of an identically-named .txt file that comes with each "part" of a campaign. If you look at the developer console, this is what conflicts. It's not hard.

Any campaign where you have to download multiple parts will say they are conflicting. Dont worry about it.

Doesnt work, even in a local game, there a weretank consistency error