Unity.Shaders is a pluggable part of Unity plugin. The Unity plugin can be used without installed ReSharper C++, but ReSharper's API verifier doesn't know that and report an error during installation. To workaround this issue disable API verification for Unity.Shaders explicitly.
Similar to https://github.com/JetBrains/resharper-unity/pull/2346, but it was added to the wrong section in csproj and therefore accidentally removed.
Unity.Shaders is a pluggable part of Unity plugin. The Unity plugin can be used without installed ReSharper C++, but ReSharper's API verifier doesn't know that and report an error during installation. To workaround this issue disable API verification for Unity.Shaders explicitly.