I think a quick fix to this problem is to do followings;
    You can easily replace
    from django.conf.urls import url
    to this:
    from django.urls import re_path as url
    And keep the rest of code to be same as before.

    If you have any of the following tags in your template:
    load staticfiles 
    load static from staticfiles 
    
    load admin_static
    Then replace it with:

    load static