Python eel module doesn`t recognize JS functions

Question

when Im calling the JS function through my python code with the eel.function()() it says "Cannot find reference 'function' in 'init.py'", it seems to be working fine in my teachers video. Here`s the python code:

eel.init('web')


def user_input():
    eel.get_ready()()

    while True:
        loading = int(input("[+] start loading? 1/0"))
        if loading == 1:
            eel.js_start_loading()()

        elif loading == 0:
            eel.js_stop_loading()()


eel.spawn(user_input())
eel.start('index.html', size=(850, 360), port=0)

Here`s the JS code:

    var progress = null;
    eel.expose(js_start_loading);
    function js_start_loading() {
        progress = Metro.activity.open({
            type: 'square',
            overlayColor: '#fff',
            overlayAlpha: 1,
            text: '<div class=\'mt-2 text-small\'>Please, wait...</div>
        });
    }

    eel.expose(js_stop_loading);
    function js_stop_loading() {
        Metro.activity.close(progress);
    }

   eel.expose(get_ready);
   function get_ready() {
       $(document).ready(function(){
           return true;
       });
   }

Would appreciate any help