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Hi.
I am updating my plugin for 2017 to 2021.
When I downloaded the Visual Studio Extension for Studio 2021 in visual studio 2017,
after opening my plugin project ,the message 'ProjectUpdateCommandPackage' package did not load correctly was shown.
I tried the following process, but the message did not disappear.
(1)Delete %localappdata%\Microsoft\VisualStudio\15.0_xxxx\ComponentModelCache
(2)Run the command "devenv.exe /clearcache" and "devenv /updateconfiguration" in Developer Command Prompt for VS2017
