Well the epic launcher updated my TSW PC editor today, and now it shows this error message during launch: Luckily it seems to boot up just fine anyway, just thought I'd make mention of it.
Yes, I had the same error. So I thought I need to update the game. And indeed this solved that error message, however installing the update for the game itself was a pain (in short: it didn't work for a long time with the Steam application) and now after 10 times I tried to install it, it worked in some way but I still have issues with it that all of my owned DLCs are not validated anymore in the Editor. I don't know if I particularly did something wrong, but the update yesterday/2 days ago seemed to have caused many issues here as well. Maybe need to reinstall TSW4 and/or the Editor completely.