Thank you very much for choosing our theme and for contacting us.
Most likely you have installed the theme incorrectly. Please delete the theme completely and reinstall it.
If you need help in the theme installation, please provide your site admin access as well as FTP and advise what page building plugin do you want to use and which demo to upload.
Theme reinstalling would not take much time. All your content would remain the same, the only thing that could change is the theme setting and widgets, they would not take much to be restored. The theme file has been damaged you should delete and reinstall.