Error MSB4226 The imported project "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VisualStudio\v16.0\DotNet\Microsoft.DotNet.Props" was not found.

[mvcsharepointdev]

I am installing matteecenter, and on this step:-

1. Create build of helper utilities a. Navigate to tree\master\cloud\src\Helper Utilities\Microsoft.Legal.MatterCenter.HelperUtilities and open Microsoft.Legal.MatterCenter.HelperUtilities solution in Visual Studio and build the solution
when i build the project, i will get this error:-

Severity Code Description Project File Line Suppression State

Error MSB4226 The imported project "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VisualStudio\v16.0\DotNet\Microsoft.DotNet.Props" was not found. Also, tried to find "DotNet\Microsoft.DotNet.Props" in the fallback search path(s) for $(VSToolsPath) - "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v16.0" . These search paths are defined in "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\MSBuild.exe.Config". Confirm that the path in the <Import> declaration is correct, and that the file exists on disk in one of the search paths. C:\c\tree\master\cloud\src\Helper Utilities\Microsoft.Legal.MatterCenter.HelperUtilities\Microsoft.Legal.MatterCenter.HelperUtilities.sln C:\c\tree\master\cloud\src\Helper Utilities\Microsoft.Legal.MatterCenter.HelperUtilities\Microsoft.Legal.ProjectCenter.UpdateProjectName\Microsoft.Legal.ProjectCenter.UpdateProjectName.xproj 8
although i have installed .net core, and i have this version :-

C:\WINDOWS\system32>dotnet --version 6.0.301

so why i am getting this error?