Fix Authentication Failed, Error Code: 0, An error was encountered during authentication on Roblox by following the suggestions in this post.

Go to My games & apps from the Xbox home screen.; Navigate to the Manage tab.; Select the Updates option.; If it appears, choose Roblox. For PC gamers, to download and install any available game ...

UPDATE: The Roblox servers appear to be back online for fans across the world. ORIGINAL: Roblox servers are currently down, leaving Windows 10 PC, Xbox One and Android owners unable to play games ...