ENFOLD DEMO CONTENTS

Hello..

I just bought an enfold theme….I have succeeded in Uploading the theme and child theme via FTP to my WP DashBoard. But my issue is

1. When i make any of the Uploaded theme ACTIVE and try to access my site i get a message “This page isn’t working
xlbillboardsng.com is currently unable to handle this request.”
HTTP ERROR 500
So i did a WP reset and everything back to normal….I repeat the same process and same Issue.

2. I can’t upload the Demos that came with the Theme..

Please i need help..

What i have done so far..

I have increased memory_limit and upload on my Server host.
I have increased that on WP as well..Runing out of options pls..have been on this for the past 3 weeks now..

HELP!!!