Не получается перейти по URL адресу, отправленному по почте для подтверждения регистрации (ошибка 404)

def account_register(request):
 
    if request.user.is_authenticated:
        return redirect("main:home")
 
    if request.method == "POST":
        registerForm = RegistrationForm(request.POST)
        if registerForm.is_valid():
            user = registerForm.save(commit=False)
            user.email = registerForm.cleaned_data["email"]
            user.set_password(registerForm.cleaned_data["password"])
            user.is_active = False
            user.save()
            current_site = get_current_site(request)
            subject = "Activate your Account"
            message = render_to_string(
                "account/account_activation_email.html",
                {
                    "user": user,
                    "domain": current_site.domain,
                    "uid": urlsafe_base64_encode(force_bytes(user.pk)),
                    "token": account_activation_token.make_token(user),
                },
            )
            user.email_user(subject=subject, message=message)
            return render(request, "account/register_email_confirm.html", {"form": registerForm})
    else:
        registerForm = RegistrationForm()
    return render(request, "account/registration.html", {"form": registerForm})
 
 
def account_activate(request, uidb64, token):
    try:
        uid = force_str(urlsafe_base64_decode(uidb64))
        user = Author.objects.get(pk=uid)
    except (TypeError, ValueError, OverflowError, user.DoesNotExist):
        user = None
    if user is not None and account_activation_token.check_token(user, token):
        user.is_active = True
        user.save()
        login(request, user)
        return redirect("main:home")
    else:
        return render(request, "account/activation_invalid.html")

class Author(AbstractBaseUser, PermissionsMixin):
    email = models.EmailField(_('почтовый адрес'), unique=True)
    user_name = models.CharField(max_length=150)
    mobile = models.CharField(max_length=20, blank=True)
 
    # User Status
    is_active = models.BooleanField(default=False)
    is_staff = models.BooleanField(default=False)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
 
    objects = CustomAccountManager()
 
    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['user_name']
 
    class Meta:
        verbose_name = "Аккаунт"
        verbose_name_plural = "Аккаунты"
 
    def __str__(self):
        return self.user_name
 
    def email_user(self, subject, message):
        send_mail(
            subject,
            message,
            'djangowebforum@gmail.com',
            [self.email],
            fail_silently=False,
        )

from django.urls import path
from django.contrib.auth import views as auth_views
from . import views
from account.forms import UserLoginForm
 
app_name = 'account'
 
urlpatterns = [
    path('login/', views.MyLoginView.as_view(template_name='account/login.html',
                                             form_class=UserLoginForm), name='login'),
    path('logout/', auth_views.LogoutView.as_view(next_page='/account/login/'), name='logout'),
 
    path('register/', views.account_register, name='register'),
    path('activate/<slug:uidb64>/<slug:token>)/', views.account_activate, name='activate'),
]

from django.contrib.auth.tokens import PasswordResetTokenGenerator
from six import text_type
 
 
class AccountActivationTokenGenerator(PasswordResetTokenGenerator):
    def _make_hash_value(self, user, timestamp):
        return (
            text_type(user.pk) + text_type(timestamp) +
            text_type(user.is_active)
        )
 
 
account_activation_token = AccountActivationTokenGenerator()