Hello,
The demo has been imported successfully when I deactivated all the plugins not related to the theme. https://prnt.sc/vmfrc1
However, there is another problem:
The page isn’t redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
This problem can sometimes be caused by disabling or refusing to accept cookies.
Please contact your host support to solve the issue. I have switched to a default theme and I still see this message, it means that our theme does not cause the problem.
Best Regards