[Python] Submit button doesn't refresh page and send POST request

I'm doing registration on Django. I made a form, added a button that should refresh the page and send a POST request. But the button does not update the page and does not send the request. I doesn't have any scripts on JavaScript. My views.py code:

from django.shortcuts import render, redirect
from .models import User
from .forms import UserForm
from django.views import View

def index(request):
return render(request, 'index.html')

def inn(request):
return render(request, 'in.html')

class PostCreate(View):
def up(self, request):
form=UserForm(request.POST)
if form.is_valid():
form.save()
return redirect('home')

def down(request):
return render(request, 'up.html')`


My forms.py code:

from .models import User
from django.forms import ModelForm

class UserForm(ModelForm):
class Meta:
model=User
fields=['NickName', 'Email', 'Password']`


And HTML: HTML

I'm tried to search any information on internet, but I'm found only about event.preventDefault() and type='button'. But I doesn't have any scripts and my type is 'submit'

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