Roblox error code 277 means that the Roblox client has lost connection to the game server. this problem can happen on all platforms such as Mobile, Windows 10, Xbox and Playstation.

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

First things first: make sure you’re running the latest version of the Roblox Player. Outdated versions are notorious for causing conflicts. Check the official Roblox website or your platform ...

Find Roblox program (C:/Program Files) and select it. Check the boxes marked next to Public and Private networks. Hit Ok to apply the changes and restart your computer.