Здравейте, получавам следното като предам .zip за Defining Classes - Exercise

Compilation result:

Compiled file is missing. Compiler output: Microsoft (R) Build Engine version 16.6.0+5ff7b0c9e for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Determining projects to restore...
  Restored ...\NUnitLiteConsoleApp.csproj (in 926 ms).
C:\Program Files\dotnet\sdk\3.1.300\Microsoft.Common.CurrentVersion.targets(1177,5): error MSB3644: The reference assemblies for .NETFramework,Version=v4.8 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks [...\DefiningClasses.csproj]

Build FAILED.

C:\Program Files\dotnet\sdk\3.1.300\Microsoft.Common.CurrentVersion.targets(1177,5): error MSB3644: The reference assemblies for .NETFramework,Version=v4.8 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks [...\DefiningClasses.csproj]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:02.63