Hey pooperman69, am I safe to assume you're playing from an old 0.4.1 save?
I haven't seen this error before, but I'll be adding a fix for it that will go on the next version. Sorry you had to deal with this.
One of two options for fixing this error quickly:
Option 1 would be... start a new save.
Since I don't want you to resort to that, there's option 2. If you're playing the desktop version, try to download the following file and paste it on the 'game' folder to replace the old version. That should fix this instance of the error for you if you load a save right before Hinterlands 3 starts:
https://drive.google.com/file/d/1qGHT8WhZdVQ6VRj3upvyVzl6jRj8D5TK/view?usp=shari...
Once again, super sorry you encountered this, and thank you very much for reporting it.