Roblox Error Code 277: The Real Fixes (Ranked by What Works)

If you play Roblox for long enough, error 277 finds you eventually. You are mid-round, everything is fine, and then the screen greys out with a message telling you that you have lost connection.

The frustrating part is that it usually happens when nothing obvious has changed. Your internet works. Other games work. Roblox worked twenty minutes ago.

Here is what the error actually means, and the fixes that resolve it in practice — in the order I would try them.

Step 1: Rule out a Roblox outage

Before you touch a single setting, open status.roblox.com.

This takes ten seconds and it will save you an hour. Roblox has platform-wide incidents fairly regularly, and during one you will get 277 no matter what you do. Nothing on your machine is broken.

Two quick signals that the problem is not yours:

• Every game drops you, not just one.
• Every device on your network — phone, console, a second PC — hits the same error.

If both are true, make a coffee and try again in twenty minutes. If only one game is affected, skip to the section on game-specific 277 errors.

Step 2: Flush your DNS cache

This is my first real fix because it costs nothing and it resolves a surprising number of cases. Your machine caches the addresses it looks up, and when one of those cached entries goes stale, your client keeps trying to reach a server that has moved.

1. Press Win + R, type cmd, then press Ctrl + Shift + Enter to open Command Prompt as administrator.
2. Run the following, one line at a time:

ipconfig /flushdns
ipconfig /release
ipconfig /renew
netsh winsock reset

3. Restart your PC. The netsh winsock reset command does not fully apply until you do.

Step 3: Delete your Roblox settings file

Roblox stores your client configuration in a small XML file. When that file gets corrupted — usually after a crash or an interrupted update — you get persistent connection errors that survive reinstalls, because reinstalling does not always remove it.

Deleting it is safe. Roblox rebuilds it on next launch with defaults.

1. Close Roblox completely. Check Task Manager for any lingering RobloxPlayerBeta.exe process and end it.
2. Press Win + R and paste: %localappdata%\Roblox
3. Open the LocalStorage folder and delete everything inside it.
4. Go back up, open the logs folder, and delete its contents too.
5. Look for a file named GlobalBasicSettings_13.xml (the number varies by version) and delete it.
6. Relaunch Roblox.

You will lose your graphics quality slider position and a few UI preferences. That is the entire cost.

Step 4: Fix the firewall permissions

This one catches people out because Roblox usually appears to be allowed through the firewall. The problem is that Windows creates separate rules for private and public networks, and Roblox frequently ends up allowed on one but not the other.

1. Open Start and search for Allow an app through Windows Firewall.
2. Click Change settings (you need admin rights).
3. Scroll to every entry containing Roblox.
4. Tick both the Private and Public boxes for each one.
5. Click OK and relaunch.

If you use third-party security software — Norton, McAfee, Avast, Bitdefender, Kaspersky — it has its own firewall that ignores the Windows one entirely. Add the same exception there, or disable that firewall for one test session to confirm whether it is the culprit.

Step 5: Turn off VPNs, proxies and filtering

Roblox and VPNs have a poor relationship. Even good VPNs add latency and route your traffic through shared IP addresses that Roblox's anti-abuse systems treat with suspicion.

Disable, for one test:

• Any VPN client, including browser-extension VPNs
• Proxy settings in Settings → Network & Internet → Proxy
• DNS filtering services such as Pi-hole, NextDNS or AdGuard DNS
• "Secure DNS" / DNS-over-HTTPS in your browser, if you play in-browser

If disabling one of these fixes it, you have your answer. Some VPNs work fine with Roblox on specific servers, so it is worth testing a few endpoints before giving up on yours.

Step 6: Switch your DNS to a public resolver

If flushing DNS helped temporarily but the problem came back, your ISP's DNS servers are likely the weak link. Switching to Cloudflare or Google is a permanent improvement and takes two minutes.

1. Settings → Network & Internet → [your connection] → Edit DNS server assignment
2. Switch from Automatic to Manual, turn on IPv4
3. Preferred DNS: 1.1.1.1, Alternate: 1.0.0.1 (Cloudflare)
4. Or use 8.8.8.8 / 8.8.4.4 for Google
5. Save, then flush your DNS again with ipconfig /flushdns

I use Cloudflare on the test bench because it is consistently the fastest resolver in most regions, but either is a clear upgrade over a typical ISP default.

Step 7: Check the router side

If you have gone this far and 277 persists, the problem is likely between your PC and the wider internet.

Restart your router properly. Unplug it at the wall, wait a full 30 seconds, plug it back in. The wait matters — it lets the capacitors discharge and forces a genuinely clean boot rather than a warm restart.

Check your ports. Roblox needs outbound UDP on ports 49152–65535. Most home routers allow this by default, but if yours has a strict firewall, gaming mode, or parental-control profile enabled, that range may be blocked.

Test on mobile data. Tether your PC to your phone's hotspot and play one round. If 277 disappears, your home network or ISP is the problem, and no amount of client-side fixing will help.

When 277 only happens in one game

This deserves its own section because the fix is completely different.

If you get 277 in a single experience but every other Roblox game is stable, your connection is fine. What is happening is one of:

• The game's own servers are struggling. Popular experiences during an update push frequently drop players.
• A script in the game is timing out. Badly optimised code — often in games with huge maps or heavy data-saving — can stall the server long enough for your client to give up.
• You are being disconnected deliberately. Some games kick idle players or players who trip an anti-exploit check, and the client sometimes surfaces this as a generic connection error.

Try joining a different server for the same game first. On the game's page, scroll to the server list and pick one with fewer players. If a low-population server holds and a full one does not, it is a server-load problem, and the only real fix is waiting or playing at a quieter time.

Fixes that get recommended but rarely help

I want to be direct about this, because there is a lot of recycled advice out there and following it wastes your afternoon.

If nothing here worked

At that point the evidence points to your ISP or your hardware. Two last diagnostics worth running:

Check for packet loss. Open Command Prompt and run:

ping -n 100 8.8.8.8

Let it finish and read the summary line. Anything above 1% packet loss on a wired connection is a genuine fault worth reporting to your ISP — quote that number to them, it moves the conversation along considerably faster than "my game keeps disconnecting".

Try a different device on the same network. If your phone on Wi-Fi holds a Roblox session while your PC drops, the issue is the PC's network adapter or drivers. Update the network driver from your motherboard manufacturer's site rather than through Windows Update, which often serves an outdated version.

If you are seeing other codes alongside this one, our full Roblox error code index covers what each one means and which fixes overlap. And if Roblox is dropping you and running badly, the connection may not be your only problem — our guide to lowering ping covers the network side properly.