Wix Velo - Wix ecom backend - Add to cart API not working since almost 24 hours

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I am using Wix ecom backend’s API to add a product to cart but this isn’t working almost since last 24 hours.

My Backend code -

/*****************************************
 * Backend code - my-backend-file.web.js *
 ****************************************/

import { Permissions, webMethod } from "wix-web-module";
import { currentCart } from "wix-ecom-backend";

export const addToCart = webMethod(
  Permissions.Anyone,
  async (options) => {
    console.log('Data received in backend - ', options);
    try {
      const updatedCurrentCart = await currentCart.addToCurrentCart(options);
      console.log("Success! Updated current cart:", updatedCurrentCart);
      return updatedCurrentCart;
    } catch (error) {
      console.error('Error in backend - ', error);
      // console.error(error);
      // Handle the error
    }
  },
);

Params passing -


{
    "options": {
        "lineItems": [{
            "catalogReference": {
                "appId": "215238eb-22a5-4c36-9e7b-e7c08025e04e",
                "catalogItemId": "35a4733e-a7b2-9cd1-06ad-1015c5578eb5",
                "options": {
                    "variantId": "00000000-0000-0000-0000-000000000000"
                }
            },
            "quantity": 1
        } ]
    }
}

Response from API -

{
  "lineItems": [],
  "buyerInfo": {
    "contactId": "7d5dd924-ee63-42c7-bc79-05c69e232534",
    "memberId": "bda2acda-906d-4a14-9115-6846812a75de"
  },
  "currency": "INR",
  "conversionCurrency": "INR",
  "buyerLanguage": "en",
  "siteLanguage": "en",
  "taxIncludedInPrices": false,
  "weightUnit": "KG",
  "subtotal": {
    "amount": "0",
    "convertedAmount": "0",
    "formattedAmount": "₹0.00",
    "formattedConvertedAmount": "₹0.00"
  },
  "subtotalAfterDiscounts": {
    "amount": "0",
    "convertedAmount": "0",
    "formattedAmount": "₹0.00",
    "formattedConvertedAmount": "₹0.00"
  },
  "discount": {
    "amount": "0",
    "convertedAmount": "0",
    "formattedAmount": "₹0.00",
    "formattedConvertedAmount": "₹0.00"
  },
  "appliedDiscounts": [],
  "purchaseFlowId": "8cf31f9e-fc94-4679-892e-7febf3800f3c",
  "paymentCurrency": "INR",
  "managedByV2": false,
  "_id": "a27abf31-f837-4f64-ada4-af6eed0edaf6",
  "_createdDate": "2025-07-04T09:40:34.206Z",
  "_updatedDate": "2025-07-05T03:49:38.890Z"
}

I see line items 0 and I don’t know why.

This used to work before!

Can anyone tell me if this API is working on your end or am I the only one facing this issue. Even Wix Stores Frontend (depreciated) API is not working

Note -
Do not look for published site with code already written, try a test now because in a website already live, the API looks working but the new code isn’t responding with line items.

Also, I have tried 2 different sites, same issue