[Plugin: Related Posts Thumbnails] Related thumbnails plugin problem…

Hi there, all i am having a problem in my plugin its shown under the post here its showing thumbnail html code under it…. pls tell the bug or whats the problem…

u can refresh the one…and look the post below one of the posts are breaking html validation….

https://www.rockpakistani.com/music/willow-smith-21st-century-girl-video-debut