一些数据不正确检查它们并再试一次。 MercadoPago API

Question

我正在尝试将订阅集成到我的平台，但我没有得到它......

  

发送表单时出错：
  任何数据都不正确   检查一下，然后再试一次。

付款网关是：“MercadoPago”

这是我的GemFile：

...
gem 'mercadopago-sdk', '~> 0.3.4'
...

我使用以下方法：

require 'mercadopago.rb'
...
def pricing
  mp = MercadoPago.new('1607128004788137', 'sq1fDz941LqsEj3jYcJgESLYvvkH0Fs3')

  mp.sandbox_mode(true)

  preapprovalPayment_data = Hash[
    "payer_email" => "carpintinimatias@gmail.com",
    "back_url" => "http://www.diabecarp.com",
    "reason" => "Suscripción PREMIUM - Diabecarp",
    "external_reference" => "OP-1234",
    "site_id" => "MLA",
    "auto_recurring" => Hash[
      "frequency" => 1,
      "frequency_type" => "months",
      "transaction_amount" => 79.99,
      "currency_id" => "ARS",
    ]
  ]

  preapprovalPayment = mp.create_preapproval_payment(preapprovalPayment_data)

  @subscription_link = preapprovalPayment['response']['sandbox_init_point']
end

在前端我有以下按钮：

=link_to "Suscribirse", @subscription_link, class:"pricing-button is-featured", name:"MP-Checkout"
%script{src:"https://www.mercadopago.com/org-img/jsapi/mptools/buttons/render.js"}