Visual Studio 2019 - Incompatible The application which this project type is based on was not found

I found the answer to this issue.. It has to do with the

*.user files.

In order to resolve the problem:

• I searched for all the files in the project directory with extension *.user
• and I removed them all
• last I reloaded the projects

And this fixed my problem.

Here is a link for reference:

(https://developercommunity.visualstudio.com/solutions/155572/view.html)