Analyzers have yellow triangles in .NET Core project

Question

I have a .NET Core 3.1 project and all of the entries under Dependencies > Analyzers in Visual Studio 2019 have yellow triangles next to them. I've verified that the files exist. I checked the various log types in the Output pane but there are no messages that seem pertinent. Building the project works fine.

Answer 1

It appears this is a known issue, tracked here:

Github issue