This has nothing to do with NAT. I have been experiencing the same issue tonight. All of my friends are able to login. I am using Xbox Series X and this is the first time it's happened. The error message is "Error during communication with cloud service" and appears right before the point where I would load in. I also tried signing into Vigor using the same Xbox and an alt account and was successful. In addition, I am able to play all of my other games without any problems or errors. Bohemia, you need to OWN this problem and figure it out ASAP!