GCBV Generic Class Based View, Django Classes Issue - django

Question

$ Hello, I was trying to use "GCBV Generic Class Based View" for edit a post, but it seems not working and event it django can't find my HTML and I don't know why , Hope I get some support ….
$ edit button link
{% if post.created_by == user %}
<div class="mt-3">
<a class="btn btn-success float-end"
href="{% url 'edit_post' post.topic.board.pk post.topic.pk post.pk %}">Edit</a>
</div>
{% endif %}
$ edit HTML Page
{% extends 'base.html' %}
{% load static %}
{% block title %}Edit Post{% endblock %}<!-- | Page-title-->
{% block content %}
<link rel="stylesheet" href="{% static 'css/boards.css' %}">
<div class="newtopic">
<div class="container container-newtopic w-50">
<h1>Edit Post</h1>
<br>
{% include 'parts/alerts.html' %}
<div aria-label="breadcrumb">
<ol class="breadcrumb n1-head">
<li class="breadcrumb-item">Boards</li>
<li class="breadcrumb-item"><a href="{% url 'topics' post.topic.board.pk
%}">
{{post.topic.board.name}}</a></li>
<li class="breadcrumb-item active" aria-current="page"><a href="">Edit
Post</a></li>
</ol>
</div>
<form method="POST" action="" novalidate class="mb-4">
{% csrf_token %}
{% include 'includes/form.html' %}
<button type="submit" class="btn main-btn w-100 rounded-pill mt-5">
Save Changes
</button>
</form>
</div>
</div>
{% endblock %}
$ Views.py
#method_decorator(login_required, name='dispatch')
class PostUpdateView(UpdateView):
model = Post
fields = ('message',)
template_name = 'edit_post.html'
pk_url_kwarg = 'post_id'
context_object_name = 'post'
def form_valid(self, form):
post = form.save(commit=False)
post.updated_by = self.request.user
post.updated_date = timezone.now()
post.save()
return redirect('topic_posts', board_id=post.topic.board.pk, topic_id=post.topic.pk)
$ Urls.py
urlpatterns = [
path('<int:board_id>/topics/<int:topic_id>/posts/<int:post_id>/edit',
views.PostUpdateView.as_view(), name="edit_post"),
]
$error message
TemplateDoesNotExist at /boards/4/topics/24/posts/28/edit
edit_post.html
Request Method: GET
Request URL: http://localhost:8000/boards/4/topics/24/posts/28/edit
Django Version: 4.0.5
Exception Type: TemplateDoesNotExist
Exception Value: edit_post.html