IAP reproduction steps

upgrade.js

const FLOXER_PRO_IOS_PRODUCT_ID = 'com.coqtail.floxer.pro_account';

window.inAppPurchase
  .getProducts([FLOXER_PRO_IOS_PRODUCT_ID])
  .then(function (products) {
    console.log(products); // Returns: []

    window.inAppPurchase
      .buy(FLOXER_PRO_IOS_PRODUCT_ID)
      .then(function (data) {
        console.log(data); // Doesn't get here
      })
      .catch(function (err) {
        console.log(err); // Throws an error object: {errorMessage: "Unknown product identifier", errorCode: 100}
      });
  })
  .catch(function (err) {
    console.log(err);
  });