error: The subcommand 'init' wasn't recognized

[F H]

Hey guys

So I created a GUI with tkinter and I wanted to make it executable, using pyinstaller and auto-py-to-exe I have a lot of problem, but first and most important problem was the run time, It takes an age to run up...then I saw a video on pyoxidizer. my project is on python 3.7.1 and it has almost 10 modules imported. I tried to get along with the official documents, but when I use pyoxidizer init pyapp, it would not work, how can I resolve this problem?