MicrosoftGrimmyThe msix package gets signed automatically in certification when you upload it to the Microsoft Store. You only need to sign the package if you want to test it before you publish it. I'm also having the same issue as you, my app installs just fine from the store, but crashes when opened. It was not doing this on previous packages and the only thing I did different was remove the uninstall.exe that it was picking up in MSIX tool. I will let you know if I solve my problem and maybe it will help you solve yours.
