Can not install at VS 15.7.5

[lettucebo]

Functional impact

Can not install at VS 15.7.5.

Minimal repro steps

At the VS 15.7.5 install using self build vsix fail
I also try download and install the vsix from AppVeyor artifacts's vsix

All get: Install Error : System.InvalidOperationException: A value for 'Component' needs to be specified in the catalog.

Further technical details

Here is the log file:
VSIXInstaller_54ee3b27-6c08-4a09-b289-977623dfbe8a.log

[JLOrdaz]

I hace same problem with same version of Visual Studio

[jodavis]

This is happening because we changed IsProductComponent to true here:

LibraryManager/src/LibraryManager.Vsix/Microsoft.Web.LibraryManager.Vsix.csproj

Line 30 in 72bf21f

<IsProductComponent>true</IsProductComponent>

When it was false, Library Manager could be installed on versions of Visual Studio that didn't already have Library Manager (15.7 or lower). However, it would fail to update if Visual Studio already had Library Manager (15.8 Preview or higher).

We changed it to true so the latest builds could be used to update 15.8 Previews. The trade-off is that those builds no longer install on older versions of Visual Studio.

You can work around this in your own builds by changing that value back to false. That's only necessary until you can upgrade to 15.8. Then you'll need to change it back to true.