Been experiencing a issue with TSW2 where it seems to just ignore mods. I usually put mods in the DLC folder, also tried the PAK folder just in case, both did not result in mods working. I have also tried Reinstalling the game, deleting configs/settings, verify game data integrity and rebooting computer. The mods are mostly route patches, sound changes, ballast changes etc I have looked around and it seems I'm the only one with this issue. thanks in advance.
You need to install them in the DLC folder. TSW2020 are far less likely to work in TSW2. Also, I found at least one TSW2 mod that probably causes TSW2 to freeze completely and one that causes crashes. I recommend you remove all mods and then try to put them back one by one. Mods also may interfere with each other.
I too had this problem, and it really confused me! First of all, have you tried running TSW as administrator? That possibly could work. I was initially running TSW on an external SSD, and could not get the mods to work. When I transferred TSW to an internal SSD, the mods worked. However, I never tried running TSW as an administrator whilst it was on the external drive, that possibly could have solved it before I transferred back to an internal drive. Hope one of these potential solutions work for you.