Can't get Coverlet working for .Net Framework 4.8 Test Class Library in Visual Studio 2017 Professional

Question

I need to create Coverlet Coverage report using coverlet.collector, with which afterwards, I want to create HTML report using ReportGenerator.

I'm having trouble running Coverlet for .Net Framework 4.8 Class Library NUnit test project in Visual Studio 2017 Professional. The projects .CSPROJ is converted to Microsoft.NET.SDK style and inside <TargetFramework>net48</TargetFramework> is set. The project that I want to run tests against is a WinForms Project targeting .Net Framework 4.6.2

I have also installed .NET 8 and .NET 6 SDKs on my computer as in the documentation for Coverlet it is noted that .NET 6 or newer is needed. When I try to run dotnet test --collect:"XPlat Code Coverage" in the project I get the following output:

Determining projects to restore...
Restored <absolute_path_for_current_project>

and the following error

error MSB4019: The imported project "C:\Program Files\dotnet\sdk\8.0.405\Microsoft\VisualStudio\v17.0\WebApplications\Microsoft.WebApplication.targets" was not found.
Confirm that the expression in the Import declaration "C:\Program Files\dotnet\sdk\8.0.405\Microsoft\VisualStudio\v17.0\WebApplications\Microsoft.WebApplication.targets" is correct, and that the file exists on disk.

the following (last) part of the given absolute path in the error message is missing (directory structure and files in them) : \Microsoft\VisualStudio\v17.0\WebApplications\Microsoft.WebApplication.targets

Following is my .CSPROJ file

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net48</TargetFramework>
    <OutputType>Library</OutputType>
    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
  </PropertyGroup>

  <ItemGroup>
    <Analyzer Include="..\packages\Nunit.Analyzers.2.10.0\analyzers\dotnet\cs\nunit.analyzers.dll" />
  </ItemGroup>
  
  <ItemGroup>
    <PackageReference Include="coverlet.collector" Version="6.0.4">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
    <PackageReference Include="Microsoft.SqlServer.SqlManagementObjects" Version="172.52.0" />
    <PackageReference Include="NUnit" Version="4.3.2" />
    <PackageReference Include="NUnit.Analyzers" Version="2.10.0" />
    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
    <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
    <PackageReference Include="System.Buffers" Version="4.6.0" />
    <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />
    <PackageReference Include="System.Memory" Version="4.6.0" />
    <PackageReference Include="System.Numerics.Vectors" Version="4.6.0" />
    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.1.0" />
    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
    <PackageReference Include="System.ValueTuple" Version="4.5.0" />
    
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include=<here_is_relative_path_to_project_I_want_to_test> />
  </ItemGroup>

  <ItemGroup>
    <Reference Include="System.Web" />
  </ItemGroup>
</Project>

Note: I do not have Visual Studio 2022 installed.

EDIT 1: I stumbled on this following post https://stackoverflow.com/a/51671875/21175857 which says that there is an issue when Solution contains projects with SDK .CSPROJ and projects with the old non-SDK .CSPROJ. So I created a new experimental solution with one Asp.Net Core 2.1 project targeting .Net Framework 4.8 (by default it uses SDK style.CSPROJ) and another Test Class Library targeting also .net framework 4.8 (also using SDK style .CSPROJ). When running the same coverlet command dotnet test --collect:"XPlat Code Coverage" it successfully generated the report.

So now I'm confused. Why does it say in the Coverlet documentation that it works with >= .Net Framework 4.6.2. I still need some way to generate coverage be it with Coverlet or something else.