Heureka! I made it work! I made it work!

After two weeks of trying shit and fixing without any clue what the fucking problem is, I finaly made it work.

Somehow Atom had a problem finding the correct paths on my Windows 10 machine. After I retried it on the Windows Console it perfectly worked.

Some solutions are simple. Some problems are stupid!

All thanks goes to @AlexDeLarge for writting awesome comments and understanding Webpack so damn well.