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How to Fix Failed to Synchronize Data for Cross Platform in Rainbow Six Siege

Lim How Wei
January 2, 2026

Tom Clancy’s Rainbow Six® Siege is a realistic and tactical team-based shooter.

It pits teams of 5 against each other in intense, close combat within destructible environments.

The game involves planning and execution, offering unrivaled levels of destruction and gadgetry.

Choose from a diverse roster of Special Forces operators, each with unique skills and gadgets.

In this guide, you’ll learn how to fix the “Failed to Synchronize Data for Cross-Platform” error Tom Clancy’s Rainbow Six Siege.

How to Fix Failed to Synchronize Data for Cross Platform in Rainbow Six Siege

  1. Go to ubisoft.com and select the profile icon on the top right.
  2. Log in to your Ubisoft account.
  3. Select the profile icon and select “Account Management”.
  4. Select “Account information” on the left sidebar.
  5. Scroll down and link your account to “Xbox” or “PlayStation” (depending on the console you use).
  6. Launch Rainbow Six Siege.
  1. Go to ubisoft.com and select the profile icon on the top right.
  2. Log in to your Ubisoft aaccount.
  3. Select the profile icon and select “Account Management”.
  4. Select “Account information” on the left sidebar.
  5. Scroll down and unlink your account to “Xbox” or “PlayStation” (depending on the console you use).
  6. Relink your account to “Xbox” or “PlayStation” again.
  7. Launch Rainbow Six Siege.

Fix 3: Log out of Ubisoft Connect and launch the game on Steam

  1. Launch Ubisoft Connect and log out of your account.
  2. Launch Steam, go to your library, and right-click “Rainbow Six Siege”.
  3. Select “Properties…”, select “Installed Files”, and select “Verify integrity of game files”.
  4. Launch Rainbow Six Siege.

Fix 4: Launch the game on Epic Games

  1. Download or launch the Epic Games Launcher.
  2. Log in to your Epic Games account.
  3. Search for “Tom Clancy’s Rainbow Six Siege X” and select it.
  4. Download or launch Rainbow Six Siege.

Fix 5: Connect to a VPN

  1. Go to protonvpn.com, scroll down, and select “Get Proton Free”.
  2. Select “Continue with free” and create an account.
  3. Follow the on-screen instructions and download Proton VPN.
  4. Connect to a free VPN like the US, Canada, or the UK.
  5. Launch Rainbow Six Siege.

Fix 6: Check Rainbow Six Siege’s status

  1. Go to ubisoft.com/en-us/game/rainbow-six/siege/status.
  2. Check if the game has issues like outages or degraded performance.
  3. If the game is down, you must wait for the developers to fix the issue before you can play again.

Further reading

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Lim How Wei

Lim How Wei is the founder of followchain.org, with 9+ years of experience in Social Media Marketing and 5+ years of experience as an active investor in stocks and cryptocurrencies. He has researched, tested, and written thousands of articles ranging from social media platforms to messaging apps.

Lim has been quoted and referenced by major publications and media companies like WikiHow, Fast Company, HuffPost, Vice, New York Post, The Conversation, and many others (source: link profile). One of his articles about the gig economy was quoted by Joe Rogan, who hosts The Joe Rogan Experience (arguably the most popular podcast in the world), in the This Past Weekend podcast by Theo Von.

In his free time, Lim uploads personal finance videos on his YouTube channel, Lim Finance, to guide others on their financial journey. He also creates gaming guides, walkthroughs, solutions, and tips for the games he plays, helping players with their progression.