LayoutError at /invoice/ Flowable <PmlTable@0x1D09C899130 7 rows x 5 cols(tallest row 841)> with cell(0,0)

I am trying to print invoice in PDF format in Django I used xhtml2pdf to convert HTML doc. to PDF but when I try to run my code it gives me this error :

LayoutError at /invoice/ Flowable <PmlTable@0x1D09C899130 7 rows x 5 cols(tallest row 841)> with cell(0,0) containing '<PmlKeepInFrame at 0x1d09b77d670> size=x'(538.5826771653543 x 5893.228346456693), tallest cell 841.9 points, too large on page 2 in frame 'body'(538.5826771653543 x 785.19685039370

this is in my views.py

from django.http import HttpResponse
from django.views.generic import View
from booking.utils import render_to_pdf
from django.template.loader import get_template

class GeneratePDF(View):
    def get(self, request, *args, **kwargs):
        template = get_template('invoice.html')
        context = {
            "invoice_id": 1234,
            "customer_name": "John Cooper",
            "amount": 1399.99,
            "today": "Today",
        }
        html = template.render(context)
        pdf = render_to_pdf('invoice.html', context)
        if pdf:
            response = HttpResponse(pdf, content_type='application/pdf')
            filename = "Invoice_%s.pdf" %("12341231")
            content = "inline; filename='%s'" %(filename)
            download = request.GET.get("download")
            if download:
                content = "attachment; filename='%s'" %(filename)
            response['Content-Disposition'] = content
            return response
        return HttpResponse("Not found")

and this is my urls.py

from django.urls import path
from booking.views import GeneratePDF

app_name = 'booking'

urlpatterns = [
  path('invoice/', GeneratePDF.as_view(), name ="invoice"),
]