I want to install an untrustworthy msix onto my xbox without getting an error message

Would this command work in powershell

Add-Computer -Name XBOX -IPAddress ipaddress -Credential usernameassword

Add-AppPackage -Path C:\MSIXPackages\MyApp.msix -Target XBOX -Force

Really the only thing you can do and what is recommended is that you
continue insisting with the Xbox team, explaining the situation in detail
since they are the only ones who can help you because they do have access to
the accounts and can see what possibly happened. . This forum is really not the
most appropriate medium to discuss your topic, especially since we as players do
not have the tools to help you as it is a sensitive privacy and security issue.

Below I will leave you the link so you can contact Xbox technical support:
https://support.xbox.com/contact-us

Note: Remember that Xbox chat is open Monday to Friday from 9:00 a.m. to 5:00 p.m. m. to 9:00 p.m. m.

Hello Durpybaby123, I am an independent advisor and I will be happy to help you today. My name is Khaji

I understand that you are trying to install an untrusted MSIX file on your Xbox and are encountering an error (0x800B010A).

Here are some steps you could take to fix this problem:

Verify digital signature: You can verify the digital signature of the MSIX file. Go to the digital signatures tab, select the certificate and click details. In the next window, select “View certificate”. In the next stage, select "Install certificate"

Use PowerShell: Another way to install applications is to open PowerShell (as administrator) and run the command Add-AppxPackage -Path C:\\Path\\App-Package.msixbundle. This command will also work for the “appxbundle”, “msix” or “appx” extensions.

Please note that these steps are generally for Windows and may not work exactly the same on Xbox. I would recommend that you contact Xbox support for help specific to your console. I hope this helps you!

Installed Shuffle party without a problem but still will not update my other installed apps without the same error message

I don't know if these server problems are related to the updates they do for the game.

I remember not long after I installed the game on my Xbox series x last year it received an update a day or 2 later and I started getting a server error message on my Xbox series x yet on my Xbox one x the game played fine without an error message.