There was a maintenance planned for Rainbow Six Siege earlier today and since the update, there have been connectivity issues with the game. While the devs have fixed the issue, a lot of frustrated players are getting Rainbow Six Siege stuck validating privileges errors on all platforms. if you are getting this error, It could be one of two things. Either your game version is different from the server, which can also be due to corrupted files or there is a problem with your connection. here are the fixes you can try.
Fix Rainbow Six Siege Stuck Validating Privileges
While there can be many reasons for this error, the most likely cause is that the game files got corrupted during the update process as such verify the game files first.
Depending on your launcher, the exact steps may vary, but if you are on Steam. Go to the LIbrary > right-click on the game > Properties > Installed Files > Verify Integrity of game files.
if the issue is still not fixed or you are on a console, you can reinstall the game. That should take care of any version mismatch or corrupted game files. So, go ahead and reinstall the game.
If the error is still not fixed, there may be a connectivity problem on your end. Connectivity problems are most difficult to handle as there are so many variables that can go wrong. Ubisoft has a great guide on how to troubleshoot for connectivity, we suggest you follow that.