How To Resolve and Fix Roblox Game Error Code 279

Roblox error code 279 is a common connectivity issue that prevents players from joining Roblox games. This frustrating error typically displays the message “Failed to connect to the game” along with error ID 17. Fortunately, there are several troubleshooting steps you can try to resolve error code 279.

What Causes Error Code 279 in Roblox

Error 279 occurs when the Roblox game client fails to establish a connection with the game server. There are a few potential causes:

  • Unstable internet connection or low bandwidth
  • Interference from firewalls, antivirus software, or browser extensions
  • Issues with the Roblox game servers
  • Corrupted Roblox game files on your device

A poor internet connection is the most common trigger for error code 279. But firewalls, antivirus programs, ad blockers, and out-of-date games can also block connections. Server outages or maintenance on Roblox’s end can prevent connections too.

Step-by-Step Guide to Fix Error Code 279

Follow these troubleshooting steps to resolve error 279:

1. Check Your Internet Connection

Run a speed test at to verify your internet connectivity. Ideal speeds for online gaming are at least 15-20 Mbps download and 2-5 Mbps upload. If speeds are lower, contact your ISP.

Restart your modem and router as well – this can fix temporary glitches. Use an ethernet cable instead of Wi-Fi too, for faster, more reliable speeds.

2. Disable Firewalls and Antivirus Software

Firewall software like Windows Defender or antivirus programs can block connections. Temporarily disable them and test if Roblox works properly. If yes, you’ll have to configure them to allow Roblox.

3. Update Your Network Drivers

Outdated network adapter drivers can affect connectivity. Search “Device Manager” on Windows and expand the “Network adapters” section. Right-click each adapter, select “Update driver”, and install the latest driver.

4. Clear Roblox Cache and Data

Corrupted temporary app data can cause error 279. On Windows, open the Run dialog with Windows + R, enter “%localappdata%\Roblox\” and delete all files.

On Android, go to Settings > Apps > Roblox > Storage > Clear Cache and Clear Data. This fixes corrupted files while retaining your Roblox account progress.

5. Reinstall Roblox

If all else fails, uninstall Roblox completely from your device and install it again fresh. On mobile, download the latest version from the Play Store or App Store. On PC, grab the Windows installer from the Roblox website.

Advanced Troubleshooting Tips

If basic fixes don’t resolve error code 279, try these advanced steps:

  • Launch Roblox in incognito/private browsing mode, without extensions. If it works, an extension is interfering.
  • Enable UPnP on your router for unrestricted connectivity.
  • Port forward TCP ports 443, 55440, 55443, and UDP 7777, 7778 if you have admin router access.
  • Use a VPN or different network to rule out ISP throttling.
  • Update router firmware and reset to factory settings if issues persist only on your network.

When to Contact Roblox Support

If you still see error 279 after trying all fixes, it could be a temporary server-side Roblox issue. Check the Roblox status page – if there are no alerts, contact Roblox support via this form or their Twitter account. Provide error details, screenshots and the troubleshooting steps attempted.


Error code 279 can be frustrating but is fixable in most cases. A spotty internet connection usually triggers it, but app conflicts and corrupted data can cause it too. Follow the step-by-step troubleshooting guide outlined here to resolve error 279. And contact Roblox support if problems persist after trying all basic and advanced fixes. With some diligent troubleshooting, you’ll hopefully be back to playing Roblox games in no time.