Microsoft Visual Studio Community 2019 CodeLens reference counter incorrect - visual-studio-2019

I have a Windows Forms App with .Net Framework 4.8 and suddenly I realized that only a vertical line appears instead of the reference counter. Any idea how to fix it?
This applies to most of my solutions,but not all. I also noticed that if I reinstall Visual Studio it works after the first start, but once I close it and open it again the error comes back.

"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE>devenv /resetuserdata" solved my problem.

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