[Python] Reverse for "not found." is not a valid view or function name error [closed]

I am working on my major project for software engineering in highschool and I keep coming up with this error when I run my Django project.

I followed the tutorials set out by my teacher but I still don't know what's going on.

This is the error message that keeps coming up.

Reverse for "not found." is not a valid view or function name.
​

This is my project urls.py file

"""
Software_Engineering_Major_Project URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
https://docs.djangoproject.com/en/2.1/topics/http/urls/

Examples:
Function views
1. Add an import: from my_app import views
2. Add a URL to urlpatterns: path('', views.home, name='home')
Class-based views
1. Add an import: from other_app.views import Home
2. Add a URL to urlpatterns: path('', Home.as_view(), name='home')
Including another URLconf
1. Import the include() function: from django.urls import include, path
2. Add a URL to urlpatterns: path('blog/', include('blog.urls'))
"""


from django.urls import path,include
import Dark_Library_store.Urls

urlpatterns = [
path('',include('Dark_Library_store.Urls')),
]


This is my app Urls.py

from django.urls import path
from . import views

urlpatterns = [
path('', views.index, name='index'),
path('store/', views.Store, name='store'),
path('featured/', views.Featured, name='featured'),
path('cart/', views.Cart, name='cart'),
path('contact/', views.Contact, name='contact'),
path('login/', views.Login, name='login'),
path('sign_up/', views.Sign_up, name='sign_up'),
]


This is my views.py file

from django.shortcuts import render
import os
from . import views



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

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

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

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

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

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

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


Any help with this will be very appreciated

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