Okay I have the updated version - 1.20. I made sure I have it in dynamic mode and I also checked Debug mode. I am currently using a childtheme of Divi by Elegant Themes, but up until recently I could pin images just fine. There doesn't seem to be any conflict with my other plugins, either.
I only have it available on blog posts. You can get to them through http://bloggingwithgypsy.com/blog
For some reason the tiny "pin it" button shows up intermittenly along with my custom image. Sometimes it goes away, sometimes it doesn't.
But the BIG problem is that when I try to pin any image taht fits the criteria (I have it set to 250 X 250px), I get the "Whoops! Sorry we could not fetch the image." error in the Pinterest popup :(
Any help would be awesome! Seems I'm not the only having issues :( Thanks!