Structured data with syntax errors detected

Shopify Discussion
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2

You need to check you sections/main-product.liquid

Looks like it was modified and the comma is missing before “url”:

"offers": [{
            "@type" : "Offer","availability" : "http://schema.org/InStock",
            "price" : 149.0,
            "priceCurrency" : "USD",
              "priceValidUntil": "2024-12-31",
              "hasMerchantReturnPolicy": {
                            "value": true
                                        },
               "shippingDetails": {
                                "type": "FreeShipping",
                                "price": "0"
                                   }
            "url" : "https:\/\/shopkiry.com\/products\/custom-night-guards?variant=46911939936564"
          },

The original code is like this: https://github.com/Shopify/dawn/blob/c67c83387ba7b654e8f4cca683727d14c06b5c5c/sections/main-product.liquid#L739-L740