Need help with rating and reviews on dynamic page

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Hello,
I need some help, I’ve been working on this for a couple of days now. I have fixed some errors but I can’t seem to get over the the below.
My rating and reviews for my dynamic page is not displaying, when the information is sent to the light box and I hit submit review these two error codes show:

Hook beforeGet for collection Members result ignored! Expected hook result to resolve to a string, but got [Object]
An error occurred in one of afterSave callbacks Error: ItemId must be a string.

I do understand what a string is but I can’t seem to fix the issue. I have followed an article on here and replaced the product ID with the ID I would like to reference which is the Business name title.

below is my lightbox code:

//-------------Imports-------------//

import wixWindow from 'wix-window';
import wixData from 'wix-data';

//-------------Global Variables-------------//

// Current product's ID. 
let businessName;

//-------------Lightbox Setup-------------//

$w.onReady(function () {
 // Get the data passed by the page that opened the lightbox.
     businessName = wixWindow.lightbox.getContext();
 
 // Set the action that occurs before the review is saved.
    $w('#submitReviews').onBeforeSave(() => {
 // If no rating was set:
 if ($w('#radioRating').value === '') {
 // Display an error message.
            $w('#rateError').show();
 // Force the save to fail.
 return Promise.reject(); 
        }

 // If a rating was set, set the element values into the fields of the dataset item.
 // These values will be saved in the collection.
        $w('#submitReviews').setFieldValues({
            businessName,
            rating: $w('#radioRating').value,
            recommends: $w('#radioGroup1').value
        });
    });
 
 // Set the action that occurs after the review is saved.
    $w('#submitReviews').onAfterSave(async () => {
 // Update the product's statistics using the updateStatistics() function.
 await updateStatistics($w('#radioGroup1').value);
 // When the statistics have been updated, close the lightbox to return the user to the product page.
        wixWindow.lightbox.close(); 
    });
});

// Update (or create) the product statistics.
async function updateStatistics(isRecommended) {
 // Get the review statistics for the current product from the "reviewStats" collection.
 let stats = await wixData.get('reviewStats', businessName);

 // If statistics data already exist for this product:
 if (stats) {
 // Add the new rating to the total rating points.
        stats.rating += parseInt($w('#radioRating').value, 10); 
 // Increase the ratings count by 1.
        stats.count += 1; 
 // Increase the recommendations by one if the user recommends the product.
        stats.recommended += (isRecommended === "true") ? 1 : 0;
 // Update the new product statistics in the "reviewStats" collection.  
 return wixData.update('reviewStats', stats)
    }
 //If no statistics data exists for this product, create a new statistics item. 
    stats = {
 // Set the statistics item's ID to the current product's ID.
        _id: businessName,
 // Set the statistics item's rating to the rating entered by the user.
        rating: parseInt($w('#radioRating').value, 10),
 // Set the statistics item's ratings count to 1 because this is the first rating.
        count: 1,
 // Set the statistics item's recommended property to 1 if the user recommends the product.
        recommended: (isRecommended === "true") ? 1 : 0
    };
 // Insert the new product statistics item into the "reviewStats" collection.
 return wixData.insert('reviewStats', stats)
}

//-------------Event Handlers-------------//

// Set the action that occurs when a rating is chosen.
export function radioRating_change(event, $w) {
 // Hide the error message.
    $w('#rateError').hide();
}