Thanks for working logins, I have checked your site and found you are using another theme and not activating the Xstore theme, Please first activate the Xstore theme from Dashboard>> Appearance >> Themes and then register the Xstore theme. See screenshot for reference: https://postimg.cc/Y4XDTc7C
It is recommended to run import on a fresh WordPress installation. For this you can use WordPress Database Reset plugin https://wordpress.org/plugins/wordpress-database-reset/ The plugin can be used to remove all the existing content and install a new version from scratch.
Regards 8Themes Team.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.