i have django react app, i added stripe to django, react build files i set on static django
i have tested on localhost with stripe cli is working fine but after i deploy my django project on vercel and create endpoint on https://dashboard.stripe.com/test/webhooks to handle stripe webhooks event i get error https://i.sstatic.net/51zS8MrH.png, (after i create new webhook endpoint i set new webhook_secret_key so problem not in webhook_secret_key)
I searched on the Internet how to fix it, they advised to set on payload

request.body.decode('utf-8)

or

request.data

but nothing helped

my code (this code on localhost is working fine but on deployed server i get error, for deployed server i changed webhook_secret_key to new secret_webhook_key from https://dashboard.stripe.com/test/webhooks and site_url to deployed server)

from django.conf import settings
from django.http import HttpResponse
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from .models import DepositHistory
from django.views.decorators.csrf import csrf_exempt
from decimal import Decimal
import stripe
from rest_framework.decorators import api_view
from usersAuth.models import AppUser

stripe.api_key = settings.STRIPE_SECRET_KEY

class StripeCheckoutView(APIView):
    def post(self, request):

        if self.request.user.is_authenticated:
            try:
                checkout_session = stripe.checkout.Session.create(
                    line_items=[
                        {
                            'price': 'price_1PY4d6GKlfpQfnx9EFKpod75',
                            'quantity': 1,
                        },
                    ],
                    metadata={"user": f'{self.request.user}'},
                    mode='payment',
                    success_url=settings.SITE_URL + '/?success=true&session_id={CHECKOUT_SESSION_ID}',
                    cancel_url=settings.SITE_URL + '/?canceled=true',
                )

                return Response({"url": checkout_session.url})
            except:
                return Response(
                    {'error': 'Something went wrong when creating stripe checkout session'},
                    status=status.HTTP_500_INTERNAL_SERVER_ERROR
                )
        
        return Response({'error': 'You must be logged in to pay'}, status=status.HTTP_401_UNAUTHORIZED)
    


@csrf_exempt
@api_view(['POST'])
def stripe_webhook_view(request):
    payload = request.body
    sig_header = request.META['HTTP_STRIPE_SIGNATURE']
    event = None

    try:
        event = stripe.Webhook.construct_event(
            payload,
            sig_header,
            settings.STRIPE_SECRET_WEBHOOK
        )
    except ValueError as e:
        # Invalid payload
        #print('Error parsing payload: {}'.format(str(e)))
        return HttpResponse({'Error parsing payload'},status=400)
    except stripe.error.SignatureVerificationError as e:
        # Invalid signature
        #print('Error verifying webhook signature: {}'.format(str(e)))
        return HttpResponse({'Error verifying webhook signature'},status=400)

    if event['type'] == 'checkout.session.completed':
        print('we are in checkout.session.completed')
        session = event['data']['object']
        user = session.metadata.user
        amount = Decimal(session.amount_total / 100)

        appuser = AppUser.objects.get(email=user)
        DepositHistory.objects.create(user=appuser, amount=amount)
        appuser.balance += amount
        appuser.save()
    if event.type == 'payment_intent.succeeded':
        payment_intent = event.data.object # contains a stripe.PaymentIntent
        print('PaymentIntent was successful!')
    elif event.type == 'payment_method.attached':
        payment_method = event.data.object # contains a stripe.PaymentMethod
        print('PaymentMethod was attached to a Customer!')
    # ... handle other event types
    else:
        print('Unhandled event type {}'.format(event.type))


    return HttpResponse(status=200)