Показывает ERROR 405 в браузере и метод не разрешен в оболочке - Django

Я создаю сайт, который имеет 2 типа пользователей.
Форма регистрации работает нормально, но форма входа и форма добавления товаров выдает HTTP 404 ERROR в браузере и показывает метод не разрешен в оболочке.

Вот все коды проекта:
seller/forms.py

def login_seller(request):
if request.user.is_authenticated:
    return redirect('home')
else:
    if request.method=='POST':
        logform = AuthenticationForm(data=request.POST)
        if logform.is_valid():
            username = form.cleaned_data.get('username')
            password = form.cleaned_data.get('password')
            user = authenticate(username=username, password=password)
            if user is not None :
                login(request,user)
                return redirect('home')
            else:
                messages.error(request,"Invalid username or password")
        else:
                messages.error(request,"Invalid username or password")
    return render(request, 'Seller/login-seller.html',
    context={'logform':AuthenticationForm()})

seller/models.py

from django.db import models
from Accounts.models import CustomUser

class SellerProfile(models.Model):
    user = models.OneToOneField(CustomUser, on_delete= models.CASCADE)
    name = models.CharField(max_length= 90)
    email = models.EmailField(max_length = 90, unique = True)
    store_name = models.CharField(max_length = 30, unique = True)

    def __str__(self):
        return self.name

products/models.py

CATEGORY_CHOICES = [
    ("ILLUSTRATION", "Digital Illustration"),
    ("EBOOKS", "eBooks"),
    ("PHOTOGRAPHS", "Photographs"),
    ("COMICS", "Comics"),
]

class Products(models.Model):
    seller = models.ForeignKey(SellerProfile, on_delete = models.CASCADE)
    title = models.CharField(max_length = 255)
    product_category = models.CharField(choices = CATEGORY_CHOICES, max_length = 100, default = 'eBooks')
    description = models.TextField()
    price = models.DecimalField(max_digits=10, decimal_places=2)
    discounted_price = models.DecimalField(max_digits=10, decimal_places=2, default = 0.00)
    thumbnail = models.ImageField(upload_to = 'media/thumbnail/',null=True, blank = True)
    files = models.FileField(upload_to = 'media/product_files/', null = True, blank = True)
    slug = models.SlugField(max_length = 255, unique = True, null = True, blank = True)
    is_featured = models.BooleanField(default = False)
    is_published = models.BooleanField(default = True)
    
    def __str__(self):
        return self.title

product/forms.py

from django import forms
from django.forms import ModelForm
from .models import Products


class ProductForm(forms.ModelForm):
    class Meta:
        model = Products
        fields = ['title', 'product_category', 'description', 'price', 'discounted_price', 'thumbnail', 'files']

product/views.py

class AddProductsView(View):
    def post(self, request, *args, **kwargs):
        product_form = ProductForm(request.POST, request.FILES)

    if product_form.is_valid():
        new_product = product_form.save(commit = False)
        new_product.seller = request.seller
        new_product.save()

    context = {
        'product_form' : product_form
    }

    return render(request, 'Seller/product-form.html', context)

Как я могу решить эту проблему? Любое предложение будет очень полезным. Спасибо

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