Help me! I create an API to get product information with ID: getProductByID ($ id). When I run in POSTMAN and the URL: "http://127.0.0.1:8080/magento/rest/V1/products/9" then I get the error result: "The product that was requested doesn't exist. Verify the product and try again. "
I checked in Catalog> Products, the product has an id of 9. Why does the API for this product result do not exist? How to fix this error?