As an example you don't love the default admin URL and also you altered the folder name from "admin2344" to "backoffice". The new URL is the combination of your domain title (or your Shop URL) with "backoffice". When I install prestashop using Quickinstall (cpanel module) the admin panel url is https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html