Nordic keyboard " < " key switched to " ' "
I found this article suggesting me to delete a file 

running the following command, then doing a reboot followed by running the assistant again fixed the issue!

sudo rm /Library/Preferences/com.apple.keyboardtype.plist


This was also mentioned in the article @Tom Gewecke commented above, but I overlooked it when I did not find the mentioned file in finder. I suppose it might be a hidden file or something.