Add form kwarg to invalid

AKPreferencePoll/views.py

@@ -83,7 +83,7 @@ class PreferencePollCreateView(EventSlugMixin, SuccessMessageMixin, FormView):
         )
         if formset.is_valid() and participant_form.is_valid():
             return self.form_valid(form=(formset, participant_form))
-        return self.form_invalid()
+        return self.form_invalid(form=(formset, participant_form))
 
     def form_valid(self, form):
         formset, participant_form = form