How To Windows

How to Fix GameLoop Error Code 21 (HTTP Connection Issue) on Windows 11

By Raj Bepari 4 min read
Recommended: Download Windows Speedup Tool to quickly fix PC issues.

GameLoop is a popular Android emulator developed for Windows that allows users to play mobile games such as PUBG Mobile, Call of Duty: Mobile, Free Fire, and other Android titles on a PC. During installation or updates, however, some users encounter GameLoop Error Code 21, often accompanied by an HTTP Connection Issue message. When this error occurs, GameLoop may fail to download game files, update the emulator, or connect to its servers.

This problem is commonly caused by an unstable internet connection, firewall or antivirus restrictions, proxy or VPN settings, DNS issues, corrupted GameLoop cache, damaged network configuration, or temporary server-side problems. In some cases, outdated GameLoop versions, incorrect system time settings, or Windows network issues can also trigger Error Code 21.

Fortunately, you can usually resolve the issue by checking your internet connection, resetting network settings, clearing GameLoop’s cache, and updating the emulator. In this guide, we’ll walk you through the most effective methods to fix GameLoop Error Code 21 (HTTP Connection Issue) on Windows 11.

How to Fix GameLoop Error Code 21 (HTTP Connection Issue) on Windows 11

Before you begin, verify that your internet connection is stable and that the GameLoop servers aren’t experiencing temporary outages. If possible, try connecting to a different network to determine whether the issue is network-specific.

1. Check Your Internet Connection

An unstable or slow internet connection is the most common cause of HTTP connection errors.

  1. Open a web browser.
  2. Visit several websites.
  3. Run an internet speed test.
  4. Restart your router if necessary.
  5. Try launching GameLoop again.

A stable internet connection is required to download emulator components and game files.

2. Restart Your Computer and Router

Temporary networking issues can interfere with GameLoop’s connection.

  1. Close GameLoop completely.
  2. Restart your computer.
  3. Power off your router for about 30 seconds.
  4. Turn it back on and wait for the connection to stabilize.
  5. Launch GameLoop again.

Restarting both devices refreshes the network connection.

3. Run GameLoop as Administrator

Administrator privileges may help GameLoop access required network resources.

  1. Right-click the GameLoop shortcut.
  2. Select Run as administrator.
  3. Click Yes if prompted by User Account Control (UAC).
  4. Retry the download or update.

Elevated permissions can resolve certain connection-related restrictions.

4. Temporarily Disable VPN or Proxy

VPNs and proxy servers may block GameLoop’s connection to its servers.

  1. Disconnect any active VPN.
  2. Open Settings > Network & Internet > Proxy.
  3. Disable any configured proxy server.
  4. Restart GameLoop.

Using a direct internet connection often resolves HTTP connection issues.

5. Allow GameLoop Through Windows Firewall

Windows Firewall may be blocking GameLoop’s network traffic.

  1. Open Windows Security.
  2. Select Firewall & network protection.
  3. Click Allow an app through firewall.
  4. Ensure GameLoop is allowed on both Private and Public networks.
  5. Save the changes.

Allowing the application through the firewall restores network access.

6. Temporarily Disable Antivirus Software

Some antivirus applications block GameLoop’s downloader.

  1. Temporarily disable your antivirus.
  2. Launch GameLoop.
  3. Test the download again.
  4. If it works, add GameLoop to your antivirus exclusions.
  5. Re-enable your antivirus.

Only do this if you’re using the official GameLoop installer.

7. Clear GameLoop Cache

Corrupted cache files may prevent GameLoop from connecting properly.

  1. Close GameLoop.
  2. Navigate to the GameLoop installation folder.
  3. Delete temporary cache files.
  4. Restart GameLoop.
  5. Retry the download.

The emulator will automatically recreate the required cache files.

8. Flush the DNS Cache and Reset the Network Stack

Corrupted DNS records or network settings can prevent GameLoop from reaching its servers.

  1. Open Command Prompt as Administrator.
  2. Run the following commands one at a time:
ipconfig /flushdns

netsh winsock reset

netsh int ip reset
  1. Restart your computer.

Resetting the network stack removes corrupted network configurations.

9. Change Your DNS Server

Using a different DNS provider can improve connectivity.

  1. Open Settings > Network & Internet.
  2. Select your active connection.
  3. Open DNS server assignment.
  4. Choose Manual.
  5. Enter a trusted public DNS server.
  6. Save the changes.
  7. Restart GameLoop.

Switching DNS servers may resolve connection problems caused by your ISP.

10. Update GameLoop

Older versions of GameLoop may contain bugs that affect server communication.

  1. Open GameLoop if possible.
  2. Check for updates.
  3. Install the latest version.
  4. Restart the emulator.

If GameLoop won’t update, download the latest installer from the official website.

11. Repair Corrupted System Files

Damaged Windows networking components can interfere with internet applications.

  1. Open Command Prompt as Administrator.
  2. Run:
sfc /scannow
  1. After the scan completes, run:
DISM /Online /Cleanup-Image /RestoreHealth
  1. Restart your PC.

These tools repair Windows system files related to networking and application functionality.

12. Reinstall GameLoop

If none of the previous methods resolve the issue, perform a clean installation.

  1. Open Settings > Apps > Installed apps.
  2. Uninstall GameLoop.
  3. Restart your computer.
  4. Download the latest version from the official GameLoop website.
  5. Install the emulator.
  6. Launch GameLoop and download your game again.

A clean installation removes corrupted files and restores the default configuration.

Conclusion

GameLoop Error Code 21 (HTTP Connection Issue) is usually caused by network connectivity problems, firewall or antivirus restrictions, proxy settings, corrupted cache files, or outdated emulator versions. In most cases, checking your internet connection, allowing GameLoop through the firewall, clearing its cache, resetting network settings, and updating the emulator will resolve the problem.

If the issue persists, flush the DNS cache, change your DNS server, repair Windows system files, or reinstall GameLoop. Keeping both Windows 11 and GameLoop updated, while maintaining a stable network connection, will help ensure uninterrupted downloads, updates, and gameplay.

Raj Bepari

I’m a digital content creator passionate about everything tech.