I purchased the Highland DLC, and it doesn't seem to be recognizing it, despite a couple of attempts at installs. I'll be looking to solve it myself, but I was hoping someone else had already found and fixed the issue. Anyone else experience this?

Thanks in advance!

Did you Turn it on. I thought the same thing the Base game and DLC were under "My collection but you have to enable the DLC or just the characters in the DLC to use it once enabled it will stay enabled till you turn it off.

I'm having the same issue. I purchase Highland, City, and the Reaper expansions. Highland is greyed out, but the other two are working as expected. Googling provides no answer.

I'm trying to use Galaxy, as I want to play online with other GOG people. I was thinking about doing this, and am glad it's an operational option. That's interesting. I have the Highland and Reaper as well, and the Highland DLC is the one that's not working. If you're referring to accessing the content in the game itself, yes I have attempted to activate it. The game is not recognizing the content, so I can't activate it in the game.

I have all dlc through offline installers and they are working fine. There are settings within game as you set up your characters such as the expansion tab that looks like an expansion icon (which enables you to turn on/off expansions with/without allowing their character options); then you have a game rules tab that you may have 'standard characters' only turned on (which would limit character selection).
If you didn't download the dlc through galaxy onto a galaxy install you are probably going to have a 'bad time' (online).
Also not having been online because i don't game with rando f^mooks most of the time I can't say, but can hazard a guess that whoever hosts may set what's available.
Happy to be corrected there if I'm wrong.