Hey there,
maxona0305! I'm terribly sorry to hear that you're experiencing this error code when trying to play Rainbow Six Siege. I would strongly suggest completing our
connectivity troubleshooting guide in full, including port forwarding. Although that guide is directed to PS4 platforms, I would still recommend completing it. Doing so will ensure that your connection to the game's online services is not being blocked or interrupted. Having an optimized connection will help to get this error resolved. However, if you do not notice any improvements after completing those steps, please create a ticket at
support.ubi.com. This will allow for more detailed documentation in our system, which will be helpful with getting this issue reported to the team. Your help would be greatly appreciated, thank you!