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Here's how to fix Roblox error code 277 (Disconnection Error) and 901 (Authentication Error) on Windows 11/10 PC or Xbox One.

One of the common reasons for the Roblox error code 901 is server maintenance or downtime. This can either occur due to issues from servers of the developers, or from Xbox servers.

Roblox Error 901 Solution According to the Roblox Help page, error code 901 typically occurs when players sign up for an account or link their Gamertag.