there are little notices:
1:
Notice: Undefined variable: other_img_indicator in
../includes/modules/content/product_info/templates/tpl_cm_pi_gallery.php on line 55
2:
Notice: Undefined variable: other_img in
../includes/modules/content/product_info/templates/tpl_cm_pi_galleryt.php on line 66
there are little notices: 1: Notice: Undefined variable: other_img_indicator in ../includes/modules/content/product_info/templates/tpl_cm_pi_gallery.php on line 55 2: Notice: Undefined variable: other_img in ../includes/modules/content/product_info/templates/tpl_cm_pi_galleryt.php on line 66
so i've fixed it by replace:
$other_img_indicator = $other_img = null;
from line 25 to line 12.
this notice is made on the advice of @raiwa https://forums.oscommerce.com/topic/494720-kissit-image-thumbnailer-support/?do=findComment&comment=1813339