Layout brokes importing content files

I have purchased Bridge theme.
Installed and activated child theme.
But when I import data content, the layout brokes.
Theme: Bridge
Data content: Demo 280 - bgproperty

Any suggestion?
Thank you very much


Please check theme docuemntation hope you will get help there.

Otherwise please contact theme Author Bridge Author Support and let them know. Theme Author will be happy to assist you.