Do you mean import from here – https://prnt.sc/v5yiu2 ?
I can see content on your site, please note that the import will overwrite your existing content.
You can import just a particular page in the next way – https://youtu.be/wkIKN2IyEZI
If you still want to import a full demo, check what errors do you get in the browser console. What demo version do you want to install?
