Hi, people. First of all, sorry if I'm breaking any rules by raising this thread from the dead, or if this is old news and I just failed at googling it. I was pointed to this thread by Raze and found a solution so I thought I'd post an update for anyone else having the same problem.

I just tested it and it works, you can directly download steam workshop files by following this guide: https://www.reddit.com/r/DivinityOr...ownload_steam_workshop_mods_for_the_gog/

I had actually emailed the creator of https://steamworkshopdownloader.io/ asking about the problem and they, like a boss, pointed me to the above solution. Apparently the "does not allow public downloads" message in this case is because newer games use a different system for accessing the workshop than older games, and the creator is working on an eventual update to do all this automatically as part of the website. They also suggested that the "Enable anonymous game servers to download workshop items" option mentioned earlier in this thread is what determines if a user can use this method anonymously.

Good luck modding!