UI for WPF and WinUI and WinForms fail to install (Package could not be opened)

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Rob
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Rob asked on 29 Apr 2025, 08:30 PM

 

MSI (s) (F0:0C) [13:22:43:458]: MainEngineThread is returning 1620
This installation package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer package.
C:\WINDOWS\Installer\1eb8b829.msi
MSI (s) (F0:38) [13:22:43:459]: User policy value 'DisableRollback' is 0
MSI (s) (F0:38) [13:22:43:459]: Machine policy value 'DisableRollback' is 0

Trying to install into VS 2022.

Rob.

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