I bought Trackmania² Canyon via Steam. I think I was able to play regularly for some time (maybe a year ago).
I have then shared my Steam library with my son via the family library sharing and now it says
Key registration failed. This game key is already used.
When I look into the list of games that are excluded from Family Library Sharing, Trackmania² is not listed, so I think I should be able to play it on up to 10 PCs.
I have already tried:
- I copied the CD key from Steam and inserted it in Trackmania again. Still the same issue
What can I do to play Trackmania² on my PC again?