You are about to win the round when your screen freezes. A white box appears with red text: Error Code 277. Lost connection to the game server. Your progress vanishes and you are back at the homepage.
This guide shows how to fix Error Code 277 in Roblox on PC, mobile, and console. You will learn what this error actually means, why it happens, and step by step fixes from quick cache clears to advanced network repairs that stop disconnections permanently.
What Error Code 277 Actually Means in Roblox
Error Code 277 is Roblox’s general connection failure message. It appears when your game client loses contact with the server after you have already joined and started playing. This error is different from login or join failures. You successfully connected and loaded into the game, then something broke that connection mid session.
The tricky part is that Error 277 is a catch all error. Roblox uses it for dozens of different disconnect causes. Your WiFi could drop for two seconds and trigger it. Your cache could corrupt and crash the game, triggering it. The game server itself could freeze from bad code and disconnect everyone, triggering it. The error tells you the symptom, which is lost connection, but not the disease causing it.
You are already in the game, playing normally. Then your screen freezes or stutters, and Error 277 appears. You are kicked back to the home screen and lose all progress in that round or session.
Roblox sends real time game data over UDP network packets. When those packets stop arriving for 10 to 15 seconds, or the game client crashes internally, the connection times out and shows Error 277.
Error 277 vs Other Roblox Connection Errors
Common Connection Errors Compared
Happens during gameplay. Connection drops after you are already in. Network instability or client crash.
Happens during join attempt. You never get into the game. Firewall blocking or ports closed.
Server removes you on purpose. Anti cheat detection or suspicious network behavior like lag switching.
Roblox web services are down. Cannot retrieve server details to join. Wait for Roblox to fix.
Quick Fixes for Roblox Error Code 277
Start Here: Fast Fixes First
Try these solutions in order. Most Error 277 cases resolve in the first three steps.
Visit Roblox Status page or check DownDetector. If servers are degraded or down, Error 277 affects everyone and you cannot fix it locally. Wait for Roblox to resolve the outage.
Corrupted temporary files cause most client side disconnects. Clear all cache from Temp and AppData folders to force Roblox to rebuild clean data.
Full power cycle clears network buffers and routing errors. Unplug both devices for 60 seconds, plug modem first, wait for online status, then plug router.
WiFi on 2.4GHz band gets interference from microwaves and other devices. Use Ethernet cable or switch to 5GHz WiFi for stable connection with less packet loss.
Platform Specific Cache Clearing Steps
Clear Windows Roblox Cache
- Close Roblox completely and check Task Manager (Ctrl+Shift+Esc) to end all RobloxPlayerBeta processes
- Press Win+R to open Run dialog
- Type %temp%\Roblox and press Enter
- Select all files with Ctrl+A and delete permanently with Shift+Delete
- Press Win+R again, type %localappdata%\Roblox and press Enter
- Open the Logs folder and delete all text files inside
- Restart Roblox and test
Removes corrupted cache that crashes the game client and causes timeout disconnects.
Clear Mac Roblox Cache
- Quit Roblox application completely
- Open Finder and press Command+Shift+G
- Type ~/Library/Caches and press Go
- Find com.roblox.roblox folder and move to Trash
- Press Command+Shift+G again
- Type ~/Library/Preferences and press Go
- Delete com.roblox.roblox.plist file
- Empty Trash and restart Roblox
Resets corrupt preferences and cache that cause connection instability on Mac.
Clear Android Roblox Cache
- Open Settings on your Android device
- Go to Apps or Applications
- Find and tap Roblox in the app list
- Tap Storage or Storage & Cache
- Tap Clear Cache button
- If error persists, also tap Clear Data (you will need to log in again)
- Restart your phone and launch Roblox
Removes broken temporary files causing mobile connection drops.
Clear iPhone iPad Cache
- iOS does not have manual cache clear for apps
- Open Settings > General > iPhone Storage
- Scroll down and tap Roblox
- Choose Offload App to keep data but remove cache
- Or choose Delete App for complete clean install
- Reinstall Roblox from App Store
- Log back in and test connection
Fresh install removes all corrupted cache and app data causing iOS disconnects.
Advanced Network Fixes for Error 277
When basic cache clearing and router restarts fail, the problem is deeper in your network configuration. These advanced fixes target DNS resolution, port blocking, and network stack corruption that cause persistent connection timeouts.
Change DNS to Google or Cloudflare
Your ISP’s DNS servers can be slow or have bad records for Roblox servers. Switching to Google DNS (8.8.8.8 and 8.8.4.4) or Cloudflare DNS (1.1.1.1 and 1.0.0.1) improves connection reliability. On Windows, go to Network Settings > Change adapter options > Right click your connection > Properties > IPv4 > Use the following DNS. Enter the new DNS addresses, click OK, then open Command Prompt as Admin and run ipconfig /flushdns to clear old records.
Open UDP Ports 49152 to 65535
Roblox uses UDP protocol on ports 49152 through 65535 for game traffic. If your router firewall blocks these, you get timeouts. Log into your router admin page (usually 192.168.1.1), find Port Forwarding or Virtual Server settings, and create a rule for UDP ports 49152-65535 pointing to your PC or console’s local IP address. This ensures game packets can reach your device.
Reset Windows Network Stack
Corrupted Windows networking components cause connection instability. Open Command Prompt as Administrator and run three commands in sequence: netsh winsock reset to fix the network API, netsh int ip reset to rebuild TCP/IP configuration, and ipconfig /flushdns to clear DNS cache. Restart your PC after running all three. This resets network settings to factory defaults and fixes deep corruption.
Browser and Cookie Issues Causing Error 277
If you launch Roblox games through a web browser instead of the desktop app, expired cookies or browser cache can break the connection handoff between the browser and the game client. The browser passes your login token to RobloxPlayerBeta.exe, but if that token is corrupted or outdated, the game cannot authenticate properly with the server.
Clear your browser cookies and cache completely. In Chrome, go to Settings > Privacy and security > Clear browsing data, select All time for the time range, check Cookies and Cached images, then clear. After clearing, close the browser fully and relaunch it. Try joining a game again. If the error persists, switch to a different browser like Firefox or Edge as a diagnostic test, or better yet, download the Roblox desktop app which bypasses browser issues entirely.
Windows 7 and Windows 8 Compatibility Problems
Roblox officially ended support for Windows 7 and Windows 8.1 in 2024 when they integrated the Hyperion anti cheat system. This anti cheat requires modern Windows kernel features that only exist in Windows 10 version 21H2 or later and Windows 11. If you are on Windows 7 or 8.1, the anti cheat fails to initialize and terminates your connection, showing Error 277.
There is no workaround for this. You must upgrade to Windows 10 or Windows 11 to play Roblox. Running the game in Compatibility Mode for Windows 7 on a Windows 10 machine might help with other errors, but if you are actually on Windows 7 or 8.1 hardware, upgrade is the only solution. Microsoft offers free upgrades from Windows 7 and 8.1 to Windows 10 if your hardware supports it.
Mobile Specific Causes of Error 277
Mobile devices have aggressive battery and data management that can kill Roblox connections. Low Power Mode on iOS and Battery Saver on Android throttle network activity to save power, which causes packet loss that triggers Error 277. Data Saver mode does the same thing by limiting background data transfers.
On iOS, WiFi Assist is a major culprit. When your WiFi signal weakens, iOS automatically switches to cellular data mid game without telling you. This changes your public IP address instantly. The Roblox server sees packets coming from a new IP and rejects them as a security precaution, disconnecting you with Error 277. Disable WiFi Assist in Settings > Cellular > WiFi Assist toggle off.
Make sure you disable Low Power Mode, Battery Saver, Data Saver, and WiFi Assist before playing. Keep your phone plugged in if possible to prevent the OS from throttling performance. Use WiFi instead of cellular data for the most stable connection.
When the Game Itself Causes Error 277
Not all Error 277 disconnects come from your internet or device. Badly coded Roblox games can crash their own servers and disconnect everyone playing. If you only get Error 277 in one specific game but other games work fine, the problem is that game’s code.
Games with too many parts, infinite script loops, or physics explosions overload the server’s CPU. When the server freezes trying to calculate physics or execute broken scripts, it stops sending heartbeat packets to all connected players. After 10 to 15 seconds of silence, every player’s client times out and shows Error 277 simultaneously. This is a server side crash, not your fault.
Memory leaks are another common cause. Scripts that spawn objects but never destroy them make the server’s RAM usage climb until it crashes. When the server dies, everyone disconnects with Error 277. If you see everyone in the server get kicked at the exact same time, it is definitely a server or game code problem.
You cannot fix game code issues yourself. Report the problem to the game developer or try playing at different times when the server might be less loaded. Choose games with good ratings and active developers who fix bugs quickly.
Windows Registry Fix for Persistent Error 277
Advanced users can try deleting corrupted Roblox registry keys that persist even after reinstalling. Windows stores Roblox configuration in the registry, and these settings can become broken, causing crashes that look like connection errors.
Press Win+R, type regedit, and press Enter to open Registry Editor. Navigate to HKEY_CURRENT_USER\SOFTWARE and look for both a Roblox key and a ROBLOX Corporation key. Right click each one and select Delete. This removes all stored settings. Close the Registry Editor and reinstall Roblox completely. The fresh install rebuilds clean registry keys.
Complete Clean Reinstall Process
If nothing else works, a complete clean reinstall removes all corrupted files and registry entries. Standard uninstall leaves behind ghost files that the new install inherits. A true clean install deletes everything manually first.
Uninstall Roblox through Windows Settings > Apps. After uninstalling, press Win+R and navigate to C:\Users\[YourUsername]\AppData\Local. Delete the entire Roblox folder. Then open Registry Editor and delete the Roblox and ROBLOX Corporation keys as described in the previous section. Restart your computer to clear any locked files from memory.
Download a fresh Roblox installer from the official Roblox website. Do not use an old installer from your Downloads folder as it might have outdated version data. Run the new installer and let it complete. Log in and test a game. This process ensures absolutely no old corrupted data carries over.
Conclusion
Error Code 277 in Roblox means your connection to the game server broke after you already joined. The error is a catch all for many different problems including network instability, corrupted cache files, bad DNS settings, closed ports, outdated operating systems, mobile power saving features, and even bad game code on the server side.
Start troubleshooting by checking if Roblox servers are down, then clear your cache completely, and restart your router with a full power cycle. If those basic fixes fail, move to advanced network configuration like changing DNS, opening UDP ports, and resetting the Windows network stack. For mobile users, disable battery saver and WiFi assist. Windows 7 and 8.1 users must upgrade to Windows 10 or 11 as those operating systems are no longer supported.
If Error 277 only happens in one specific game while others work fine, the problem is that game’s server or code, not your connection. Report it to the developer and try different games. With systematic troubleshooting from simple to advanced, most Error 277 cases resolve without needing a full reinstall.
FAQ
What is Error Code 277 in Roblox
Error Code 277 is a general connection failure that happens when you lose connection to the Roblox game server during gameplay. It is a catch all error for many different disconnect causes including network problems, corrupted cache, or server crashes.
How do I fix Error 277 in Roblox
Clear your Roblox cache from Temp and AppData folders, restart your router and modem with a full power cycle, switch to Ethernet or 5GHz WiFi, change DNS to Google or Cloudflare, and open UDP ports 49152 to 65535 in your router settings.
Why do I keep getting Error 277 in Roblox
Persistent Error 277 comes from unstable WiFi with packet loss, corrupted cache files that keep regenerating, firewall blocking UDP ports, outdated network drivers, or playing games with bad server code that crashes repeatedly.
Does Error 277 mean I am banned from Roblox
No, Error 277 is a connection error, not a ban. Bans show a specific ban message with duration. Error 277 means your connection dropped or timed out during gameplay for technical reasons.
Can bad WiFi cause Error 277 in Roblox
Yes, WiFi interference and packet loss are the most common causes of Error 277. Use Ethernet cable for best stability, or switch to 5GHz WiFi and move closer to your router to reduce packet drops.
How do I clear Roblox cache on Windows
Press Win+R, type %temp%\Roblox, delete all files. Then press Win+R again, type %localappdata%\Roblox, open the Logs folder, and delete all text files. Restart Roblox after clearing both locations.
Will reinstalling Roblox fix Error 277
A clean reinstall can fix Error 277 if caused by corrupted client files. You must manually delete AppData\Local\Roblox folder and registry keys after uninstalling, then download a fresh installer from the Roblox website.
Does Error 277 happen on mobile Roblox
Yes, mobile devices get Error 277 from Low Power Mode, Battery Saver, Data Saver, or WiFi Assist switching networks mid game. Disable these features and use stable WiFi instead of cellular data to prevent disconnects.
Can a VPN cause Error 277 in Roblox
Yes, VPNs add latency and can trigger security flags that disconnect you. Some VPN IP addresses are blocked by Roblox anti cheat. Disable your VPN completely and test if Error 277 stops happening.
Why does Error 277 only happen in certain games
If Error 277 affects one game but not others, that game has bad server code causing crashes or overloaded servers. Physics engine overload, memory leaks, or infinite script loops crash the server and disconnect everyone with Error 277.
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