Despite Msixbundle, Appx, and AppxPackage installers being reliable ways to sideload the app packages, several users cannot do so.

Why am I getting the App package not supported error?

Some of our readers are getting the This app package is not supported for installation by app installer error when attempting to sideload app packages, especially the ones downloaded from unofficial sources. There are several possible reasons behind the issue:

Third-party app packages – App packages downloaded from a third-party website other throw the App package not supported error. Microsoft Store does not support the installer – If Microsoft Store does not support the Msixbundle installer, it will not be to install the app package successfully. Restricted installer capabilities – Installers with restrictive capabilities can also be the reason behind the error. Developer Mode is disabled – Developer mode should be active on your Windows computer if you want to sideload the .msixbundle, .Appx and .AppxBundle app packages on your PC.

Interestingly, there are a couple of workarounds to resolve the This app package is not supported for Installation errors in Windows 11.

How can I fix the app package not supported error?

1. Enable Developer Mode

2. Install app packages using Windows PowerShell

This time you will not receive the This Package is not supported for Installation error. Exit the PowerShell window after the package installation is successful, and launch the app. To avoid dependency issues, install the dependencies packages before installing the main app package.

3. Use the App Installer

Wait until the App Installer discovers and downloads the essential dependency packages and the main app package. After the installation is successful, the app will automatically launch on your PC. These two workarounds will help you get past the This app package is not supported for installation error during sideloading app packages using app installers. While you are here, you may want to know how to fix the This Installation Package Could not be Opened error using some simple methods. If you have any other questions or solutions for this issue, feel free to use the comments section below.

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