Posts 'Sticky' Appears In Slider But Won't Appears In Thumbnail Grid

Hi,

I make all posts as ‘sticky’ and all posts are appeaars in sliders, but it shows nothing in the tumbnails grid even already installed the ‘Multiple Post Thumbnails’ plugin and set the secondary image for thumbnail for each post.

“Nothing Found
It seems we can’t find what you’re looking for. Perhaps searching can help.”

Need your help, how to make the thumbnails appeaar back again.

Thanks.