Symptoms
When updating Plesk, the operation fails with the error message:
Upgrading Microsoft ASP.NET Core Module...
Failed to install 'C:ProgramDataPleskInstallercacheASPNETCORE-WINthirdparty-windowsaspnetcoremodule_x64_en_12.2.19169.msi': Fatal error during installation. (Error code 1603)
ERROR: The installation of the package 'aspnetcoremodule' failed with code 1603. (upgrade: Upgrading Microsoft ASP.NET Core Module...)
Cause
Unclear.
Resolution
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Connect to the Plesk server via RDP.
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Go to Windows Start > All Programs > Windows System > Control Panel > Programs and Features.
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Uninstall the following components:
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Microsoft ASP.NET Core Module
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Microsoft ASP.NET Core Module V2
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Restart the server.
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Once the server is started, launch Plesk Installer and finish the update.
Note: In Plesk Installer, select Microsoft ASP.NET Core (under Microsoft ASP.NET Core hosting features) to install it back.