Error in Django "Not found the requested resource was not found on this server"?

Question

Django

Good afternoon. I've been learning Django and how to practice building a simple website. When I added 1 application, everything was fine, but when I created the second application, problems already started. I deleted and created the application (about) several times. When I follow the link 27.0.0.1:8000/about, Django gives me the error "Not found the requested resource was not found on this server". How to fix? Thanks for your reply in advance.

main urls file

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
path('about', include('about.urls')),
path('', include('main.urls')),
path('admin/', admin.site.urls),
]

urls from about

from django.urls import path
from . import views

urlpatterns = [
path('about', views.about),
]

views

from django.shortcuts import render

# Create your views here.

def about(request):
return render(request, 'about/about.html')

Answer 1

you yourself described the path - 127.0.0.1:8000/aboutabout