How to fix "argument of type 'nonetype' is not iterable"?

See more:

Windows

Win32

Python

This is a time tracker app and it should track everything ( even open tabs on chrome ). now first i wanted to use win32gui but i was getting an error and i couldn't fix it ( Getting requirements to build wheel ... error - error: subprocess-exited-with-error ), so i installed pywin32 but now when i run the app it says:
argument of type 'NoneType' is not iterable.
File "D:\ATT.py", line 58, in <module>
if 'Google Chrome' in new_window_name:

why am i getting this error?
what should i do to fix it?

Code:

from __future__ import print_function
import time
from os import system
from activity import *
import json
import datetime
import sys
if sys.platform in ['Windows', 'win32api', 'cygwin']:
    import pywin32
    import uiautomation as auto

active_window_name = ""
activity_name = ""
start_time = datetime.datetime.now()
activeList = AcitivyList([])
first_time = True


def url_to_name(url):
    string_list = url.split('/')
    return string_list[2]


def get_active_window():
    _active_window_name = None
    if sys.platform in ['Windows', 'win32api', 'cygwin']:
        window = pywin32.GetForegroundWindow()
        _active_window_name = pywin32.GetWindowText(window)
    else:
        print("sys.platform={platform} is not supported."
              .format(platform=sys.platform))
        print(sys.version)
    return _active_window_name

def get_chrome_url():
    if sys.platform in ['Windows', 'win32api', 'cygwin']:
        window = pywin32.GetForegroundWindow()
        chromeControl = auto.ControlFromHandle(window)
        edit = chromeControl.EditControl()
        return 'https://' + edit.GetValuePattern().Value
    else:
        print("sys.platform={platform} is not supported."
              .format(platform=sys.platform))
        print(sys.version)
    return _active_window_name

try:
    activeList.initialize_me()
except Exception:
    print('No json')


try:
    while True:
        previous_site = ""
        if sys.platform not in ['linux', 'linux2']:
            new_window_name = get_active_window()
            if 'Google Chrome' in new_window_name:
                new_window_name = url_to_name(get_chrome_url())
        
        if active_window_name != new_window_name:
            print(active_window_name)
            activity_name = active_window_name

            if not first_time:
                end_time = datetime.datetime.now()
                time_entry = TimeEntry(start_time, end_time, 0, 0, 0, 0)
                time_entry._get_specific_times()

                exists = False
                for activity in activeList.activities:
                    if activity.name == activity_name:
                        exists = True
                        activity.time_entries.append(time_entry)

                if not exists:
                    activity = Activity(activity_name, [time_entry])
                    activeList.activities.append(activity)
                with open('activities.json', 'w') as json_file:
                    json.dump(activeList.serialize(), json_file,
                              indent=4, sort_keys=True)
                    start_time = datetime.datetime.now()
            first_time = False
            active_window_name = new_window_name

        time.sleep(1)
    
except KeyboardInterrupt:
    with open('activities.json', 'w') as json_file:
        json.dump(activeList.serialize(), json_file, indent=4, sort_keys=True)

What I have tried:

I tried using pywin32 and pypiwin32 but it's still not working and i'm getting an error.