Roblox 277

On screen: Lost connection to the game server, please reconnect. (Error Code: 277)

What it actually means

The persistent UDP connection between your client and one specific game server has dropped. That server is a single process running one instance of one experience, not Roblox as a whole.

Ranked by how often each is the real cause: the instance you were in crashed or was shut down; a script in that experience errored or ran out of memory and took the server down with it; packet loss or blocked UDP on your side, with a VPN being the most common culprit on PC; or a phone switching between Wi-Fi and mobile data.

How to tell which one you have

Join a different experience. If that works, the problem belongs to the experience you were in and its developer, not to Roblox. If 277 follows you everywhere but a second device on the same network is fine, it is your device. If it follows you everywhere including on mobile data, check the Roblox status.

Fixes, in the order worth trying

1. Join a different experience — This is diagnosis, not a hopeful retry. It tells you within a minute whether anything on your side is worth touching.
2. Switch networks — A phone hotspot is the fastest test. If it works there, your home network or ISP is dropping the UDP traffic.
3. Turn off any VPN or proxy — The most common single cause on PC. Roblox voice and game traffic runs over UDP that many VPNs handle badly.
4. Check the system date and time — A wrong clock breaks the TLS handshake and produces connection errors that look like anything but a clock problem.
5. Allow outbound UDP 49152 to 65535 — Roblox game servers use this range. A restrictive firewall or a school network blocking it gives exactly this error.
6. Clear the Roblox log folders — Delete the contents of %localappdata%\\Roblox\\logs and %USERPROFILE%\\AppData\\LocalLow\\RbxLogs.
7. Reinstall and clear AppData — Roblox's own last resort, and genuinely last — it fixes a small share of cases.

Operator documentation: en.help.roblox.com. Roblox's own article says the error occurs “when the client application servers fail to establish a network connection” and offers three steps: reinstall, clear AppData, call your ISP. That is the same template they publish for several unrelated codes. The breakdown above reflects what actually causes it.

Common questions