Spree::Conekta::PaymentSource::Card throws error: emtpy payment method

[benzzdan]

Hi, I have a RoR Spree application and I added the conekta gem with spree and everything works fine, the only issue is that the Credit Card payment generates error message on the screen: "No payment" here are the logs:

Error en la pasarela
--- !ruby/object:Spree::Conekta::Response
success: false
message: Empty payment method data.
params:
object: error
type: parameter_validation_error
message: Método de pago vacío.
message_to_purchaser: Método de pago vacío.
param: payment_method
code: invalid_payment_type
validation_error:
status:
source_method: !ruby/module 'Spree::Conekta::PaymentSource::Card'

Please help.