Incorrect canonical implementation: Make certain that the canonical URL is proper and isn't going to conflict with hreflang directives. Test your Nginx configuration for syntax faults using the command ‘nginx -t‘. If every little thing is alright, you’ll see a concept stating ‘configuration file /and so forth/nginx/nginx.conf take a look https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/30904--hreflang-seo.html