Как читается и решается эта ошибка?

Internal Server Error: /blog/post/new-slug/
Traceback (most recent call last):
  File "C:\Users\Admin\Desktop\dj\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
  File "C:\Users\Admin\Desktop\dj\venv\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\Admin\Desktop\dj\venv\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\Admin\Desktop\dj\app\blogengine\blog\views.py", line 13, in post_detail
    return render (request , 'blog/post_detail_html', context={'post': post})
  File "C:\Users\Admin\Desktop\dj\venv\lib\site-packages\django\shortcuts.py", line 36, in render
    content = loader.render_to_string(template_name, context, request, using=using)
  File "C:\Users\Admin\Desktop\dj\venv\lib\site-packages\django\template\loader.py", line 61, in render_to_string
    template = get_template(template_name, using=using)
  File "C:\Users\Admin\Desktop\dj\venv\lib\site-packages\django\template\loader.py", line 19, in get_template
    raise TemplateDoesNotExist(template_name, chain=chain)
django.template.exceptions.TemplateDoesNotExist: blog/post_detail_html
[20/Jun/2019 01:11:55] "GET /blog/post/new-slug/ HTTP/1.1" 500 78339