Uploading Unity UWP app to MS store flight fails with ERROR (and no further detail)

Unity Engine
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Hey Everyone!

I’m just trying to update a UWP game on the MS store (for the first time in a year)

After generating a new WSATestCertificate.pfx (due to the old one expiring) I worked through the usual build process in Unity (successfully) then built the MSIXUPLOAD packages in Visual Studio 2022 (successfully)

But on attempting to upload the packages to an MS store flight, the upload fails immediately with the word error and nothing else (great job MS!)

After clearing caches, rebooting etc nothing appeared to work.

So I built the APPXUPLOAD package in UBA for the first time (which was successful) but again it fails the upload to an MS store flight with the same issue (UBA was also updated with the latest certificate)

Has anyone else experienced this by any chance? The MS dashboard looks quite different since I last logged on, so maybe MS has broken something (more than likely)

I’ve checked for non-obvious reasons like out of date partner centre agreements, tax profiles etc but they’re all valid (with ticks)

I’ve logged a support ticket with MS and appreciate this is not a Unity problem, but just trying to ascertain if this is an isolated issue or wider spread.

Any feedback would be much appreciated.

Update #1

I extracted the APPXBUNDLE from the UBA zip file and run the entire set of WACK tests on it locally and they all passed.

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A quick update on this if anyone ever experiences the same issue.

I came across this thread (tagged under MS Office) but the issue it describes was very similar to the one I am experiencing…

https://answers.microsoft.com/en-us/msoffice/forum/all/solved-select-a-certificate-for-authentication/159c0a3a-ba85-4601-8586-faac45284b31

Upon searching the Personal User Certificate store, there were indeed two MS-Organisation-Access certificates present.

After removing them and retrying the upload, no Select Authentication Certificate prompt was shown (not mentioned in my original post) and the uploads completed successfully.

I’ve asked MS what these are and why they’re affecting Partner Centre uploads, so will report back any further news.

1 Like
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Last update…

After asking me for technical info (screenshots, logs) then pondering it for several days, Microsoft decided to bat me around between support teams… then close the ticket without any advice\help :man_facepalming:

I can’t be bothered to pursue it any further.

Anyway, the MS certs above were definitely the issue. Deleting them has meant partner centre package uploads no longer error.

That said, I’ve no idea if deleting them will cause issues elsewhere, i.e., MS Office.