Hi yoyo, reading your message I think you are downloading the ninjam server "source code". This is not the "final product" ready for use, this is the code used by developers/programmers to "compile" the code and generate the executables (ready for users).
Sorry if is not the case and I'm misunderstanding your question. If I'm understanding right check this post:
https://forum.cockos.com/showthread.php?t=165468