Incorrect canonical implementation: Be sure that the canonical URL is appropriate and does not conflict with hreflang directives. The procedure needs are pretty standard which means you don’t want just about anything Exclusive. PrestaShop just has a couple of configuration requires that almost all hosts should be capable to support. https://addons.prestashop.com/pt/seo-referenciamento-natural/30904-tags-automaticas-hreflang-e-tags-canonicas-seo.html