Be sure you’re constantly using the same URL construction. Don’t add a canonical that employs HTTP or WWW Should the canonical Model of your website is HTTPS or non-WWW. Preserve how you structure URLs consistent throughout your website and throughout your canonical tags. 2nd, In case your articles is obtainable https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html