Bug: Unable to install app due to 0x800B0109 certificate error with Files.stable.appinstaller

[DominoKorean]

Description

I live in South Korea, but in the Microsoft Store the app is locked to the Hungary region and currency, so I am unable to install it through the Store.
Because of this, I have to install the app using the appinstaller file instead.

However, when trying to install either Files.stable.appinstaller or Files.preview.appinstaller, the installation fails with the following error:

App installation failed with error message: error 0x800B0109: The root certificate of the signature in the app package or bundle must be trusted. (0x80070570)

Due to this error, installation is not possible.
I have tried installing both via Windows Update and via PowerShell, but neither method worked.

Steps To Reproduce

1. Run the appinstaller file
2. Click the Install button

Files Version

4.0.21.0

Windows Version

22631.6199

User ID

No response

Log File

---

[yaira2]

Does the offline installation method work? https://files.community/docs/getting-started/install

[DominoKorean]

I have already tried this.
When using the
Add-AppxPackage -AppInstallerFile https://cdn.files.community/files/stable/Files.Package.appinstaller
the following error occurs.

Add-AppxPackage : Deployment failed with HRESULT: 0x80073CF0, Package could not be opened.
error 0x800B0109: The root certificate of the signature in the app package or bundle must be trusted.
NOTE: For additional information, look for [ActivityId] b82b27d3-723e-0000-dc78-2cb83e72dc01 in the Event Log or use
the command line Get-AppPackageLog -ActivityID b82b27d3-723e-0000-dc78-2cb83e72dc01
At line:1 char:1
+ Add-AppxPackage -AppInstallerFile https://cdn.files.community/files/s ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OpenError: (https://cdn.fil...ge.appinstaller:String) [Add-AppxPackage], FileNotFoundExc
   eption
    + FullyQualifiedErrorId : DeploymentError,Microsoft.Windows.Appx.PackageManager.Commands.AddAppxPackageCommand

I have already tried most of the common steps, such as checking for Windows updates and toggling Developer Mode.

[Josh65-2201]

That isn't for offline installs, scroll down further for the Offline install header

[DominoKorean]

Isn’t this the same as using the .appinstaller?

I installed all four links under x64 (AMD and Intel) in order.
The third one, Microsoft.WindowsAppRuntime.1.8.msix, shows the following message:

There's a newer version of this package already installed. To install this older package instead, uninstall the one currently on your system (0x80073D06)`

The last one, Files.Package_4.0.21.0_x64_arm64.msixbundle, fails with the same error as before:

App installation failed with error message: error 0x800B0109: The root certificate of the signature in the app package or bundle must be trusted. (0x80070570)`

[yaira2]

Isn’t this the same as using the .appinstaller?

It's a little different. Are you able to install any msix packages?

[DominoKorean]

If you are asking whether the MSIX files themselves can be installed,
the two Visual C++ runtime packages that come before the offline installation were installed successfully.

[yaira2]

The only thing that comes to mind is that the trusted root for Microsoft Trusted Signing is missing. Is your installation of Windows modified in any way or is there a third-party security software?