I have created a coupon (Cart promotion). I use " for a subselection of items in cart matching" in the rule. If try to apply the coupon but the cart don't not satisfy the rule then i get a 500 internal server error.
The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator to inform of the time the error occurred and of anything you might have done that may have caused the error. More information about this error may be available in the server error log.
I saw the logs of server and i find that:
[Thu Dec 24 23:15:01 2015] [warn] [client xxx.xxx.xxx.xxx] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server, referer: http://www.exampe.com/checkout/cart/ [Thu Dec 24 23:15:01 2015] [error] [client xxx.xxx.xxx.xxx] Premature end of script headers: index.php, referer: http://www.example.com/checkout/cart/
Any solution for this problem?