[Ask]Testimonial Solution

Gw dah install modul testimonial dari http://www.opencart.com/index.php?route ... d=2&page=1

Tp muncul pesan Notice: Undefined index: testimonial_id in C:\xampp\htdocs\cart2\catalog\controller\product\testimonial.php on line 88 di front store gw.

Need Solution Please.....

(Gw pake OC 1.47 webserver Xampp)

Thanks before!