I'm having the same issue (1080 SC).
This looks like a larger Ubisoft/Uplay problem as opposed to a Nvidia redemption code error. I've been scanning the forums and almost all users across every type of install (e.g., retail, digital, redemption code, etc.) are having significant issues. Even if we were able to launch the game, it is questionable if we would even be able to play.
tldr - this does not seem to be exclusively a Nvidia issue, just another failed Uplay launch.
Just to add a list of everything everyone in this thread has tried already to maybe save someone in the near future some effort.
2 People have contacted NVIDIA and both have told us its Ubi's problem.
3 Of us have verified game files, to no avail.
2 of us have uninstalled/reinstalled, to no avail.
I think just about everyone has tried rebooting their computer. (obviously to no avail)
3 or maybe more of us have contacted Ubisoft DIRECTLY through customer support, 2 of them were literally told "we dont know what the problem is, sorry", and the other was told they needed to check something and that theyd be right back, but never came back lol.
All of this in vain so far.