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Rainbow Six Siege Error Code 8-0x00003700, How to Fix Error Code 8-0x00003700?

Rainbow Six Siege Error Code 8-0x00003700 stops players from joining matches with issues in gameplay, squad creation, and server connectivity.

by T Santhosh

Updated Apr 03, 2024

Rainbow Six Siege Error Code 8-0x00003700, How to Fix Error Code 8-0x00003700?

Rainbow Six Siege Error Code 8-0x00003700 

Players are disappointed and frustrated by the Rainbow Six Siege error code 8-0x00003700. This error may prevent your ability to play the game and join matches, making it more difficult for you to get a smooth start to Operation Deadly Omen in Y9S1. Gamers who are eager to finish off Battle Pass quickly are also irritated because this causes rapid progression, which abruptly stops the game.

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This error indicates issues with the gameplay, squad creation, and game launch, among other aspects of the game. The error message states that you should try again later and shows that the servers are not reachable.

How to Fix Error Code 8-0x00003700 in Rainbow Six Siege?

The following steps may help you fix Rainbow Six Siege error code 8-0x00003700 and enhance your gaming experience.

Verify Your Internet Connection

To determine whether your internet connection is unstable or weak, check its status, since you may get the error code 8-0x00003700. Follow some guidelines to check your internet connection.

  • When your internet packets are not received or you have unstable internet access, you may encounter this error. 
  • To resolve connectivity problems, get in touch with your internet service provider (ISP). 
  • Update the drivers for your network adapter or card.
  • For approximately three minutes, disconnect your router from the power source.
  • One possible cause of this issue could be security software interference. If you are using any antivirus or VPN, turn it all off to see if everything functions well now. 
  • You can sort programs by "Network" under the processes card of your Task Manager by using the keyboard shortcut Ctrl+Shift+Esc. After that, you'll be able to see which programs are using up the most of your bandwidth. This could be the reason something is downloading in the background.
  • If you are currently using WiFi, switch to a cable.

Restart your device and check for updates 

Restart Rainbow Six Siege after shutting it down completely. Sometimes, this can fix momentary bugs. Check if any updates are available. Older versions can sometimes result in connection problems, such as error code 8-0x00003700. So it might take you back online in Rainbow Six Siege with an update.

Modify the firewall settings 

Make sure your firewall isn't blocking Rainbow Six Siege in order to ensure a stable connection. Go to the firewall and network protection settings by going to the Windows Security menu. Once there, make an exception so that Rainbow Six Siege can communicate with your firewall without restriction. 

Verify the integrity of files 

Quit the game and check the integrity of the files. This procedure will repair and re-download any damaged or corrupted Rainbow Six Siege files. Be aware that installing and reinstalling BattleEye services is a time-consuming process.

  • If you purchased the game through Steam, go to library > Choose Rainbow Six Seige, then use the right-click menu to select Properties, Local Files, and finally Verify Integrity of Game Files. 
  • On the PS5, go to Settings, then Users and Accounts, then click Other, and finally select Restore Licenses.

Verify the game's server status

Verify the official game server's current status. You won't be able to check for problems until the servers come back online if the results indicate that the servers are offline.

Updating Network Drivers

Update your network driver to fix Rainbow Six Siege Error Code 8-0x00003700, which is caused by network driver problems. This essential software ensures efficient online communication between your PC and other devices.

DNS Flush 

This error might occasionally be caused by temporary glitches with your internet connection. Reset Winsock, renew your IP address, and flush your DNS cache to make things right. To do this, you have to open the Command Prompt with administrator privileges. Then, to carry out these actions, execute three distinct commands. After that, a simple restart of the PC will make sure that the changes are effective.

Contact Support

If the servers are not functioning properly, go to the official Ubisoft support page. Click on Contact Us after visiting their support page and scroll down. When you describe your exact problem, they should be able to provide you with some guidance on how to fix this error.

Cause of Error Code 8-0x00003700 

The Rainbow Six Siege Error Code 8-0x00003700 denotes problems with the gameplay, lobby creation, and game launch. It is due to a server connection problem, which can be caused by many things, including user-end internet connectivity issues and Ubisoft server downtime or maintenance. This error may be caused by multiple factors such as 

  • Problems with your internet connection
  • There are issues with your network drivers.
  • Server connectivity problems with the game servers
  • Interference from third parties mostly refers to external software in the game's operations.
  • Missing or corrupted game files
  • Server availability in particular areas may be affected by regional service interruptions.


The online tactical shooter game Tom Clancy's Rainbow Six Siege was created by Ubisoft Montreal and released by Ubisoft. In various game modes, such as rescuing a hostage, neutralizing a bomb, and taking control of a target inside a room, each player takes on the role of an attacker or defender. On December 1, 2015, it was released globally for the PlayStation 4, Windows, and Xbox One. Exactly five years later, on December 1, 2020, it was also released for the PlayStation 5 and Xbox Series X/S. 

The game's thirty-third season, Operation Deadly Omen, is the first season of Year 9. In this first-person shooter game, players can choose from a variety of Rainbow team operators. Because of the advancements made by the post-launch updates, some critics considered Siege to be among the best multiplayer games available on the market after the game's release.

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