Subscription Product Create [errorCode: '100001']

[umerarif01]

Hi! I am trying to create a subscription product but it gives me this error:

null {
  status: 'failure',
  errorCode: '100001',
  errorMessage: 'Sistem hatası',
  systemTime: 1710691331394
}

Code:

var Iyzipay = require("iyzipay");

const iyzipay = new Iyzipay({
  apiKey: apiKey,
  secretKey: secretKey,
  uri: "https://sandbox-api.iyzipay.com",
});

// Define the data for creating the subscription product
const data = {
  name: "Example Subscription Product",
};

iyzipay.subscriptionProduct.create(data, function (err, result) {
  console.log(err, result);
});

Please I need help

[umerarif01]

I tested to create a payment and that worked but I can't create subscription product. So I tried to test it with some other API keys which I found online and for some reason with those keys, it worked. Do I need to enable some sort of setting from sandbox dashboard or what?