Steam rewards not working

This is also occurring for myself, the buttons seem to have a "wave" or "pulse" effect, but the rewards are not redeemed.  I have checked and synced with Steam multiple times, but this does not seem to solve the issue.  I hadn't played either Endless Space 2 or Endless Legend in some time, but wanted to come back since I saw the Endless Legend 2 trailer.  I picked up a couple of expansions I didn't already have, and saw the G2G rewards, so naturally I wanted to add them to the game as well.  If for some reason these rewards are no longer available, please state as such on the website and remove the links in game.

I am having the same problem, is there a fix?

Same problem here. Someone already fixed it?

Same problem here. Went for the community chalenge addon to get the swarm missiles and railguns but it won't transfer to my steam account for some reason. (I already have linked my steam account with this one)