How do i use Plugin in Source build Engine?

Thank you for your advice. I needed some time to dig into this. I tried to rebuild the PLugin with a c++ project, but it didnt worked. I did:

  • create C++ Project ‘MyPluginProject’
  • Open VS2017 → analyze data → save&close
  • Cope Plugin to [Project]/[Plugins]
  • right click on [Project].uproject → Generate Visual Studio project files → works
  • open [project].sln
    → rebuild (took 50 min)

after finishing, i tried to open the project and the error appears:

The followimodules are missing or built with different engine version:
UE4Editor-MathWorksSimulation.dll
Would you like to rebuild them now?
->yes
→ error: [Project] could not be compiled. Try rebuilding from source

I tried many suggestions i found online like: delete Binaries/ Intermediate of the Plugin or the project or both. Nothing worked.
The new binaries are way smaller then the Original Binaries of the Plugin.

I think the *build.cs might be incomplete and the ThirdParty source is not included while generation. Also the directory structure is nothing like any other Plugins i found
The .h/.cpp files are all in the [Intermediate] folder instead of [Source]. Is this the Problem? Or does the Manufacturer not provide the Source code to the public?