Thank you for getting in touch with us. My name is Attila and I'm happy to assist you today. I appreciate your patience while we've been working towards your ticket.
Problems with the importing method such as this, are usually related to server configuration issues unfortunately.
Please check the LayerSlider System Status, located in the Options menu on the WordPress sidebar, for any error messages or notifications that could provide additional information on this case.
Best Regards,Attila | Kreatura Support Team