Premiere Pro Won't Show the Image; It's Marked in Red in the Sequence

I'm just trying to create a short video clip of my latest listing, but Premiere Pro just refuses to display the photo that I want to edit. And when I try to play it in the sequence, its presence in the sequence is marked in red while the pictures in yellow are perfectly fine.

I don't know what to do. Any advice would be appreciated! Thank you.

Sam