I'm getting an error Image format not supported: image/x-ms-bmp

From Documentation

If your list and listing detail page are broken with this error:

PHP Fatal error: Uncaught exception 'Exception' with message 'Image format not supported: image/x-ms-bmp' in /home/domain/public_html/components/com_s2framework/vendors/phpthumb/ThumbBase.inc.php:193

it happened because some of your listings have images that are uploaded as .jpg images, but they are actually .bmp images.

To fix the problem, you will need to replace those images with actual .jpg images because JReviews doesn't support .bmp images.