django-formset Issue -  VM88:1 Uncaught (in promise) SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON VM89:1 Uncaught (in promise) SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON

I am facing the following issue while using django-formset

VM88:1 Uncaught (in promise) SyntaxError: Unexpected token ‘<’, "<!DOCTYPE "… is not valid JSON
VM89:1 Uncaught (in promise) SyntaxError: Unexpected token ‘<’, "<!DOCTYPE "… is not valid JSON

views.py

class OfficeDetailCreateView(AdminUserTypeAuthMixin,FileUploadMixin, FormViewMixin, LoginRequiredMixin, CreateView):
model = Officedet
template_name = ‘home/crud/crud_template.html’
form_class = OfficedetForm
success_url = reverse_lazy(‘office_list_view’) # or whatever makes sense
extra_context = {
‘pagetitle’:‘Office Creation’
}

form.py

class OfficedetForm(forms.ModelForm):

office_logo = fields.FileField(
    label="Office Logo",
    widget=UploadedFileInput,
    required=True,
)

office_gender_type = forms.ModelChoiceField(
    queryset=OFFICE_GENDER_TYPE_CHOICE.objects.all(),
    widget=Selectize(
        
        placeholder="Choose Gender",
    ),
)

office_mgnt_type = forms.ModelChoiceField(
    queryset=OFFICE_MGNT_TYPE_CHOICE.objects.all(),
    widget=Selectize(
        
        placeholder="Choose Management",
    ),
)

office_class_level = forms.ModelChoiceField(
    queryset=OfficeClassLevel.objects.all(),
    widget=Selectize(
        
        placeholder="Choose Class Level",
    ),
)

office_place = forms.ModelChoiceField(
    queryset=Places.objects.all(),
    widget=Selectize(
        search_lookup='placename__icontains',
        placeholder="Choose Place",
        
    ),
)

office_type = forms.ChoiceField(
    choices=[ ('SCHOOL','SCHOOL'),
    ('ADMIN','ADMIN'),],
    widget=Selectize,
)


default_renderer = FormRenderer(
    form_css_classes='row',
    field_css_classes={
        '*': 'mb-2 col-12', 
        "office_code": 'mb-2 col-2', 
        "office_name": 'mb-2 col-4',
        "office_mail": 'mb-2 col-3',
        "office_place": 'mb-2 col-3',
         '*': 'mb-2 col-12', 
        "office_gender_type": 'mb-2 col-3', 
        "office_mgnt_type": 'mb-2 col-3',
        "office_class_level": 'mb-2 col-3',
        "office_type": 'mb-2 col-3',

         '*': 'mb-2 col-12', 
        "office_tanno": 'mb-2 col-4', 
        "office_udisecode": 'mb-2 col-4', 
        "office_logo": 'mb-2 col-4', 


        }
        )
class Meta:
    model = Officedet
    fields = ["office_code",

“office_name”,
“office_mail”,
“office_place”,
“office_gender_type”,
“office_mgnt_type”,
“office_class_level”,
“office_type”,
‘office_tanno’,
‘office_udisecode’,
“office_logo”,
]

page.html
{% extends “layouts/masterpage-formset.html” %}
{% block pagecontent %}
{% load render_form from formsetify %}

{% render_form form %}

Submit Reset Back to list
{% endblock pagecontent %}

Side note: When posting code here, enclose the code between lines of three backtick - ` characters. This means you’ll have a line of ```, then your code, then another line of ```. This forces the forum software to keep your code properly formatted.

What do you mean by:

Those aren’t standard Python error messages.

Please provide additional details about exactly how and where you’re seeing these messages.

Also, what is this formsetify package? Your package or a generally-available third-party package? What is this render_form tag?