This is the error: ! LaTeX Error: File ngerman.sty' not found. Type X to quit or to proceed, or enter new name. (Default extension: sty)
• do not use \usepackage[ngerman}. Use instead \usepackage[ngerman]{babel}. However, give a complete example. – user2478 Sep 11 '17 at 16:02
• Welcome to TeX.SX! Please help us (and also you) and add a minimal working example (MWE), that illustrates your problem. Reproducing the problem and finding out what the issue is will be much easier when we see compilable code, starting with \documentclass and ending with \end{document}. – Bobyandbob Sep 11 '17 at 16:04
• The german and ngerman packages are largely obsolete; avoid them and do as Herbert recommends; don't forget to add \usepackage[T1]{fontenc} and, possibly, \usepackage[utf8]{inputenc}`. – egreg Sep 11 '17 at 16:05