You could force to incorporate "http" or "https" ahead of the canonical URL (in order to avoid duplicate amongst the http and https version of an internet site). Ex: if you select to pressure https for your canonical URL, the canonical URL of your web site are going to be https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html