Sorry you’re obtaining problems with accessing the admin location. Take into account that your admin directory will likely have been renamed to what ever you set it – for stability good reasons. This happens during the installation of PrestaShop. If you’re wanting to make use of a generic URL including https://addons.prestashop.com/pl/seo-pozycjonowanie-naturalne/31857-automatyczne-google-rich-snippets-json-ld-opengraph-seo.html