In game Pack Filters are gone

I'm not sure what caused it or when exactly it happened, but my pack filters in build mode and CAS are suddenly gone and the only option I see is the base game. I tried repairing the game, removing the only mod I'm using -which is mccc with only the cheats module-, I'm not using any CC, I tried letting the game create a brand new file in documents and running a fresh game, nothing worked. The filters are just not there anymore. All the DLC/packs are okay, the game is running okay, all packs, items are physically in game, but just filters no longer exist. I suppose it can have something to do with language/ strings files in the main folder that the game is installed, somehow something is mismatching with DLC/packs content, like everything is there but somehow, they're no longer properly registered - linked in the files that the game provides text and language and UI, but I'm not sure.