Problems using createview on heroku

Question

I was working locally and 3 Create Views worked perfectly for me to upload data. I passed it to Heroku and sadly out of the 3, only one CreateView works for me, any idea what it could be?

I already reviewed the code and it is very similar both in views and in the template.

The problem is that when I click the save button it doesn't do anything, it doesn't save anything and it doesn't take me to any link, but it seems strange to me that locally it worked quite well and not on heroku

models

class Carro(models.Model):

   placas=models.CharField(max_length=255)
   año=models.IntegerField()
   marca=models.CharField(max_length=255)
   modelo=models.CharField(max_length=255)
   tipo=models.CharField(max_length=255)
   motor=models.CharField(max_length=255, default='0')
   vin=models.CharField(max_length=255)
   color=models.CharField(max_length=255)
   agente_seguros=models.CharField(max_length=255)
   compañia_seguros=models.CharField(max_length=255)
   no_politica=models.CharField(max_length=255)
   cliente= models.ForeignKey(Clientes, on_delete=models.SET_NULL, null=True)




   def __str__(self):
       return f'{self.placas} {self.año}{self.marca} {self.modelo} {self.tipo}{self.motor}{self.vin}{self.color}' \
              f'{self.agente_seguros}{self.compañia_seguros}{self.no_politica}{self.cliente}'

views

class create_carros(CreateView):
   model=Carro
   form_class=CarroForm
   template_name='carros/carros-form-add.html'
   success_url=reverse_lazy('carros:list_cars')

forms

class CarroForm(forms.ModelForm):
   class Meta:
       model=Carro
       fields='__all__'
       widgets = {
           'placas': forms.TextInput(
               attrs={

                   'class': 'form-control',

               }
           ),
           'año': forms.TextInput(
               attrs={

                   'class': 'form-control'
               }
           ),
           'marca': forms.TextInput(
               attrs={

                   'class': 'form-control'
               }
           ),
           'modelo': forms.TextInput(
               attrs={

                   'class': 'form-control'
               }
           ),
           'tipo': forms.TextInput(
               attrs={

                   'class': 'form-control'
               }
           ),

           'vin': forms.TextInput(
               attrs={

                   'class': 'form-control'
               }
           ),
           'color': forms.TextInput(
               attrs={

                   'class': 'form-control'
               }
           ),
           'agente_seguros': forms.TextInput(
               attrs={

                   'class': 'form-control'
               }
           ),
           'compañia_seguros': forms.TextInput(
               attrs={

                   'class': 'form-control'
               }
           ),
           'no_politica': forms.TextInput(
               attrs={

                   'class': 'form-control'
               }
           ),
           'cliente': forms.Select(
               attrs={
                   'class': 'form-select'
               }
           ),

       }