It was not possible to find any compatible framework version

 

Open Project.csproj file

Existing
  <TargetFramework>netcoreapp2.2</TargetFramework>

Change it to
<TargetFramework>netcoreapp3.1</TargetFramework>
 
Note: - You will get the list of frameworks version from an error.

- The following frameworks were found:
      1.0.1 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      3.1.16 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

      5.0.7 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]