All about Ubisoft Service is Currently Unavailable Error
Uplay displays the notice "a Ubisoft service is currently unavailable" when trying to open a Ubisoft game. Every Ubisoft game includes Uplay, which is used to manage digital distribution, DRM, multiplayer, and chat. This issue will appear when you try to open a game or log into Uplay on your PC.
Fortunately, many users were willing to share the remedies they used to resolve the issue on their computers. We've included step-by-step instructions for these techniques, so make sure you follow them carefully and you might be able to solve the problem!