Error code -532462766 when using FunctionMonkey

I'm trying to follow the "Build elegent REST APIs" for a project.

When I get to the section where you build and run it, I get the error:

Severity Code Description Project File Line Suppression State Error MSB3073 The command "dotnet "C:\Users\ext-patrik.ek.nuget\packages\functionmonkey.compiler\3.0.17\build\netstandard1.0....\tools\netcoreapp2.1/FunctionMonkey.Compiler.dll""C:\Users\ext-patrik.ek\source\repos\ServerlessHSAzureFunctions\ServerlessHSAzureFunctions\bin\Debug\netcoreapp2.1\bin\ServerlessHSAzureFunctions.dll" --netcore21" exited with code -532462766. ServerlessHSAzureFunctions C:\Users\ext-patrik.ek.nuget\packages\functionmonkey.compiler\3.0.17\build\netstandard1.0\FunctionMonkey.Compiler.targets 21

Now, I've been trying to find out what the issue is and when I open it up, it goes to the Function Monkey.Compiler.targets and highlight this set of code in an XML file:

<!-- we ensure the functions post build has run first -->
      <!--<Target Name="_FunctionMonkeyCompiler" AfterTargets="Build">-->
      <Target Name="_FunctionMonkeyCompiler" AfterTargets="_GenerateFunctionsPostBuild">
        <Exec Command="$(FunctionCompilerExe) $(FunctionCompilerParams)" />
      </Target>

So, My question is: What could be the issue here?