NoReverseMatch at , I have Recently a class from one app and added it to a new app and I revised everything but keep receiving this Error, what did i miss?

I have created a new app in a project and moved one of the classes from one app to the new app 

I checked every step but I keep getting No Reverse match I wrote the name of the app before the namespace but still 

HTML : 

 

 <a class="nav-link waves-effect" href="{% url 'score:post-create' %}" > Upload Designs </a>

URLS 

from django.urls import include, path

from . import views

from .views import (PostCreateView, PostDeleteView, PostDetailView,

                    PostListView, PostUpdateView, UserPostListView)

app_name = 'score'

urlpatterns = [

    path('user/<str:username>', UserPostListView.as_view(), name='user-posts'),

    path('score/', PostListView.as_view(), name='score'),

    path('score/<int:pk>/', PostDetailView.as_view(), name='post-detail'),

    path('score/new/', include(('post-create.urls', 'post-create'), PostCreateView.as_view(), name='post-create'),

    path('score/<int:pk>/update/', PostUpdateView.as_view(), name='post-update'),

    path('score/<int:pk>/delete/', PostDeleteView.as_view(), name='post-delete')

]

settings:

from django.conf import settings

from django.conf.urls.static import static

from django.contrib import admin

from django.contrib.auth import views as auth_views

from django.contrib.staticfiles.urls import staticfiles_urlpatterns

from django.urls import include, path

from users import views as user_views

urlpatterns = [

    path('admin/', admin.site.urls),

    path('accounts/', include('allauth.urls')),

    path('', include('core.urls', namespace='core')),

    path('register/', user_views.register, name='register'),

    path('profile/', user_views.profile, name='profile'),

views

from django.contrib import messages

from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin

from django.contrib.auth.models import User

from django.contrib.messages.views import SuccessMessageMixin

from django.http import HttpResponse

from django.shortcuts import get_object_or_404, redirect, render

from django.utils import timezone

from django.views.generic import (

    CreateView, DeleteView, DetailView, ListView, UpdateView)

from .models import Post

class PostListView(ListView):

    model = Post

    template_name = "score.html"

    context_object_name = 'posts'

class PostCreateView(LoginRequiredMixin, SuccessMessageMixin, CreateView):

    model = Post

    fields = ['caption', 'design']

    template_name = "score/post_form.html"

    def form_valid(self, form):

        form.instance.author = self.request.user

        return super().form_valid(form)

models

from django.conf import settings

from django.contrib.auth.models import User

from django.db import models

from django.shortcuts import reverse

from django.utils import timezone

# Create your models here.

class Post(models.Model):

    author = models.ForeignKey(User, on_delete=models.CASCADE)

    design = models.ImageField(

        blank=False, null=True, upload_to='new designs')

    def __str__(self):

        return self.caption

    def get_absolute_url(self):

        return reverse("score:post-detail", kwargs={"pk": self.pk})

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