Not all links opening...
Click on one of the coupons to go to the site. You will notice it does not navigate through.
http://carbootcoupons.co.uk/store/zestbeauty-com/
I have left the plugin active so you can see.
I can assure you with the plugin off it links through just fine. Also tested with the child theme de-activated and it still crashes.
Permalinks re-saved too..
Please sort this out asap.