Please check the demo instance down below the place the module is installed and configured in debug manner. It is Doing work good about the demo instance. The module helps you to insert image on all website pages a preloader, also identified, as being a loading page, or preloading screen https://www.presta-addons-modules.com/en/front-office/prestashop-twitter-feeds-widget-for-selected-categories-and-languages.html