I am going through a tutorial, but it is not working and I can’t figure out why.

It is “Python + JavaScript – Full Stack App Tutorial”

I downloaded the files whole sale, but when I use ‘npm run dev’ command it says

usage: vite [options]

A simple and minimal static site generator.

positional arguments:
  {init,new,build,serve}
                        Options to help create, build and serve your project.

options:
  -h, --help            show this help message and exit
  -v, --version         show program's version number and exit

When I manually type in the code following the video I try to run it and there is a problem with the following line in ContactList.jsx

{contacts.map((contact) => (

error is
Uncaught TypeError: Cannot read properties of undefined (reading ‘map’)

It looks like contact doesn’t exist, and it is empty because I am just starting the program, but I have no idea what the problem could be.