Hi,
Please add the line in the product/tmpl/carousel.php file
$thnumbnailWidth=$this->params->get('pagination_image_width');
$imageHelper = hikashop_get('helper.image');
if(empty($thnumbnailWidth) && empty($thnumbnailHeight)){
It would be fix in the next release of HikaShop.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.