Как убрать ошибку NoReverseMatch at / в django?

Question

[IoannKh]

При переходе на главную страницу возникает ошибка NoReverseMatch at /
Reverse for 'blogtemplate-detail' with arguments '('',)' not found. 1 pattern(s) tried: ['blogtemplates/(?P[-a-zA-Z0-9_]+)/\\Z'].
views.py

class BlogTemplateDetailView(DetailView):
    model = BlogTemplate
    # queryset = BlogTemplate.objects.get(id=id)
    template_name = 'blogtemplate-detail.html'
    slug_url_kwarg = 'blogtemplates_slug'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['blog_list'] = BlogTemplate.objects.all()
        # context['blog_list'] = BlogTemplate.objects.get(id=id)

        return context

urls.py

path('blogtemplates/<slug:blogtemplates_slug>/', views.BlogTemplateDetailView.as_view(), name='blogtemplate-detail'),

В шаблоне blogtemplate-detail.html

<h4><a href="{% url 'element_one:blogtemplate-detail' blogtemplates.slug   %}"></a></h4>

модель

class BlogTemplate(models.Model):
    objects = models.Manager()
    date = models.DateField(auto_now=True)
    author_name = models.ForeignKey(User, on_delete=models.CASCADE)
    title = models.CharField(max_length=300)
    blog_context = models.TextField()
    comment = models.ForeignKey('Comment', on_delete=models.SET_NULL, null=True)
    slug = models.SlugField(unique=True)