Action one: Add the module zip file from the back-Business office Module & Services menu tab. Module Manager area using the add button. Once the thriving installation module menu, the url will surface from the left menu or best menu inside the back-office much more place. In my code illustration, https://www.presta-addons-modules.com/en/prestashop-live-chat-support-with-zopim-zendesk-chat.html