Twenty20 stopped working

Hello,

I was successfully using the plugin to on this page https://www.boraboraphotovideo.com/photo-editing-composite-images/ – I recently dicovered it stopped working. I tried to create a new slider in a blog post but it did not work either. Other than standard updates, there was nothing new set up on the site. I tried to disable some plugins but that did not help either.

Any insight would be greatly appreciated as I really liked the plugin.

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