Thanks for contacting us.
As I can see, you imported the demo already.
In case if automatic plugin installation fails (as a rule it is because of your server settings), you can install them manually via your Dashboard: Plugins > Add New > Upload Plugin > Browse plugins archives. Or via FTP, by uploading and extracting the plugin zip files into wp-content/plugins folder. You can find the zip files for plugins installation here – https://www.8theme.com/downloads/
A lot of plugins are installed on your site, right now, but we would recommend you to disable plugins that you are not using, because every plugin slows down the site a bit. If Elementor demo version was imported, disable WPBakery plugin, read description of other plugins to decide.
