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

In your PC’s firewall settings, locate Roblox among the list of installed problems. Depending on your firewall software, look for an option related to changing permissions or settings.

When you’re trying to play Roblox and keep getting the “Bad Request 400” error, it can put a wrench in your plans.

How to fix Roblox 517 error? Below is a list of solutions that you can try if you can’t play and your PC keeps showing the Roblox error code 517. Verify server status.