[Plugin: WP Simple Galleries] Can only create one gallery?

I am trying to use the plugin on a website, I need a gallery on each page. Unfortunately it doesn’t permit me to create more than one gallery. I created a great little gallery on one page, then when I went to the next the plugin shows up but once I select my image the screen goes white and nothing happens.

Thanks!

https://www.ads-software.com/extend/plugins/wp-simple-galleries/