Unity version 2021.3.28f1 lacks the UWP Publish Button in Visual Studio Build for package generation

Nabil Aittaleb 0

We are making a HoloLens 2 application using Unity 2021.3.28f1 and MRTK 2.8.3.0.

The Visual Studio 2022 (version 17.4.5) project that is generated does not recognise the included Package.appxmanifest.
This results in the "Create App Packages..." button missing in the right-click menu and being greyed out under "Project>Publish>Create App Packages...".

This problem happens when using Unity 2021.3.28f1 and is working fine with previous version (Unity 2021.3.18f1).

PS: The certificate WSATestCertificate.pfx is not expired.

As you can see with this screenshot, the "Create App Package..." button is disabled

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Y W 0 Reputation points

2023-08-21T06:04:00.92+00:00

I checked with Unity 2021.3.29f1.

It seems that Unity does not generate the Package.appxmanifest file.

When I add the Package.appxmanifest file generated by an earlier version to my UWP project, the menu is activated.

Alternatively, there seems to be no problem with outputting appx directly from MRTK's Build Window.
Eran Gindi 0 Reputation points

2023-08-21T07:38:07.65+00:00

Same issue happen to me.
The publish option is gray and cannot be clicked in unity version 2021.3.29f1
Any idea how to fix?
Eran Gindi 0 Reputation points

2023-08-21T07:57:00.0933333+00:00

YW, I did not keep the old Package.appxmanifest and every update I just clear the folder and generate all again.
Y W 0 Reputation points

2023-08-21T08:04:27.04+00:00

I found the Package.appxmanifest file in the Unity Data project of the UWP solution.

Copying that file into the app project activates the menu.

However, I have not confirmed that the manifest is exactly the same.

1 answer

Zuocheng Wang - MSFT 3,091 Reputation points Microsoft Vendor

2023-08-21T10:06:38.93+00:00

Hello, Welcome to Microsoft Q&A,

I can reproduce this issue on Unity 2021.3.29f1. I followed @Y W 's method and it worked for me.

This seems to be a bug in newer versions of Unity, please refer to Bug - Unity version 2021.3.28f1 lacks the UWP Publish Button in Visual Studio Build for package generation - Unity Forum.
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