How do we fix 0x8a15000f : Data required by the source is missing?

dont run as "admin" , just use your normal account

Hello

Here are some steps you can try to resolve the “0x8a15000f : Data required by the source is missing” error:

Verify you can access the sources: Copy the source URLs from the winget sources list command and try accessing them in the browser.

Update your Winget sources: Run the command winget source update to force Winget to update information for all package sources.

Change region in Windows settings: If your local CDN is having an issue, you can try changing the region in your Windows settings.

Re-register the Winget package: Run the following command in an elevated PowerShell window to re-register the package:

Add-AppxPackage -DisableDevelopmentMode -Register "C:\Program Files\WindowsApps\Microsoft.Winget.Source_2021.718.1322.843_neutral__8wekyb3d8bbwe\AppXManifest.xml" -Verbose

Perform a complete system shutdown: Close all the core services and then try to run Winget. You can do this by running the following command in the Command Prompt with administrator privileges:

shutdown /s /f /t 0

Reopen Winget in the Terminal App: Completely close the Command Prompt or PowerShell instance you are running on the PC. You can use the Task Manager to stop an unresponsive instance of either of these command-line tools. After that, open Command Prompt or PowerShell with administrator privileges on your system. Type Winget and press the Enter key to check if Winget works now.

I solved this by going into the Microsoft Store app and updating the App Installer app. Because my machine had an older version, it was trying to access an outdated URL for the source.