Django 3.1 | Admin page appearance issue

In your projects’ root urls.py file, simply add the below code to disable the new sidebar feature.

from django.contrib import admin

admin.autodiscover()
admin.site.enable_nav_sidebar = False

Reference:

1. https://docs.djangoproject.com/en/3.1/releases/3.1/#django-contrib-admin
2. https://docs.djangoproject.com/en/3.1/ref/contrib/admin/#django.contrib.admin.AdminSite.enable_nav_sidebar