Please update the theme to the latest version – 7.0.2 ( https://prnt.sc/uus20f )- https://xstore.helpscoutdocs.com/article/63-theme-update
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/
Once you get the latest version of the theme and Core plugin, the import should go fine.
If you need our assistance with the demo content installation, provide temporary wp-admin access. Also, let us know what demo version do you prefer.
