ListingPro theme not activating

After loading ListingPro theme, when i am activating theme on wordpress. Both backend and website is turning blank.
what to do?

Hello,

Contact your item author how to with purchase key get purchse key
Still have any question then open a Envato support ticket

If your item support expired then hire a freelancer form Envato Studio
hope your problem will solved.

Thanks

Thank you

i will try.