I bought xbox game pass and decided to play Sea Of Thieves but i cant even put on donwload...

There is methods for Xbox console but i have PC+ my issue is that i cant dowload the game

This link, Error code lookup 0x803F8001 has steps to help you resolve this issue.

If this method didnt help what i need to do then

Hello Fors1ty,

Thank you for keeping us updated. Are you receiving this error when you attempt to install other Xbox Game Pass games? Does the Xbox Game Pass subscription appear active on the

Microsoft account website? We recommend making sure that
Windows 10 is up to date. We have a support article which provides
troubleshooting for game installations on Windows 10.

Hello Fors1ty,

Thanks for coming to the forums. We understand having issue downloading game. Here are a few steps to try.

The issue might be nothing more than a temporary glitch with the Windows Store. You can try pressing the
X on the rightmost end of the application you’re trying to download or update, and try updating it again. This has solved the issue for more than one user.

1. Press the Windows key on your keyboard and type in cmd
   
2. Right-click the Command Prompt result, and choose
   Run as administrator. OR
3. Press simultaneously the Windows and X keys on your keyboard.
4. From the menu that opens, choose Command Prompt (Admin).
5. Once the Command Prompt opens, type in the following command, and press
   Enter to execute it.
   
   PowerShell -ExecutionPolicy Unrestricted -Command “& {$manifest = (Get-AppxPackage Microsoft.WindowsStore).InstallLocation + ‘\AppxManifest.xml’ ; Add-AppxPackage -DisableDevelopmentMode -Register $manifest}”
   
6. Once the command is executed, close the Command Prompt and try updating/downloading your apps again.

Hope this helps.

Brad