Fatal error: Cannot access empty property in /home/..../wp-content/th
I have clipper theme v1.4 with child theme Koupon v1.1.3.
But when I active Koupon, I seeing the following error.
Fatal error: Cannot access empty property in /home/xxxxxxx/public_html/wp
-content/themes/clipper/includes/theme-functions.php on line 387
Any ideas why I'm seeing this error? and any ideas how to fix this?