cant work featured option

hi,,,

i installed it as normal.. but when i try to set my featured image on this plugin,, then, its not work… actually,, when i click on set featured image: after then i selected my pic from media libery. but this images not not actually show.. can you help me or give me a solution..

thanks
wish you good luck!

https://www.ads-software.com/extend/plugins/ppm-carousel/