Post_id function doesn’t seem to be working

Hi!

First of all, thanks for creating this plugin. I’m trying it out in a subarea of a website of mine and its perfect for something I’ll need in the future. The only problem I have is that the process of adding pictures to the page I want the shortcode on, only to delete them afterwards (so that only the randomly selected picture is visible) is a bit tedious and chaotic for me. Therefore I’d love to use the post_id function that is enabled in your plugin. As I understand it, I can create another post on my website and essentially use it as an image library right? So that I can just stuff it with images and make one of them load randomly on the actual page that I’m using the plugin on? On my website this’d be http://www.cardsofconfound.com/katerstorage. When I try that by entering the post id or name of the page the plugin renders the little red box saying that it thinks I forgot to enter a page or renders one single picture that doesn’t change after refreshing. Do you have an idea of what could be going wrong here?

Best,
Jonathan

The page I need help with: [log in to see the link]