Klaviyo Back in stock with api

Hi, I am trying to add back in stock in Shopify using new Klaviyo api as previous one is depreciated and not working but i am getting  Cors policy error. 

Following is the code please help me what I am doing wrong. 

 

const settings = {
  async: true,
  crossDomain: true,
  url: 'https://a.klaviyo.com/api/back-in-stock-subscriptions',
  method: 'POST',
  headers: {
    accept: 'application/vnd.api+json',
    revision: '2024-10-15',
    'content-type': 'application/vnd.api+json',
    Authorization: 'XBfV5N pk_0d7d1911eb8824c6ee8265ac16f16bcf9f'
  },

  data: {
    "type": "back-in-stock-subscription",
    "attributes": {
      "profile": {
        "data": {
            "type": "profile",
            "attributes": {
                "email": "matt.kemp@klaviyo-demo.com"
            }
        }
      },
      "channels": ["EMAIL"],
    },
    "relationships": {
      "variant": {
        "data": {
          "type": "catalog-variant",
          "id": "$shopify:::$default:::40800102350963"
        }
      }
    }
  }

};

$.ajax(settings).done(res => {
  console.log(res);