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.

If you have encountered the Roblox Authentication Error Code 901 on Xbox or Windows 11/10 PC, try the solutions in this post to resolve the issue.

Fix #1: Use a non-child account. The most common reason why many people are unable to join a game and encounter the Roblox error code 103 is an issue with their account.

Roblox users are reporting widespread login issues and receiving an "Unknown error occurred" message.