hisptech-one-page-parallax-wordpress-theme - not able to import demo theme

I have purchased and installed the hisptech theme.
I get internal error when I try to import xml filre and json file, my server hosts php ver 5.5.30
Hence finding difficult to use page builder to create template afresh.

I run a softare consulting and digital marketing agency , i need a template to showcase my software services (nearly 50 services). Can you suggest a suitable theme and swap against hisptech theme?

Need your help urgently

Thanks
SRidhar
[email protected]