I get a error triangle for teh Justified Gallery icon.

If I go to the Objects Library, it shows the update button. I pres and it goes through the motions, but when complete, the button doesn't disappear. When i return the icon restores, but goes back to the error one when I return later.

I've just added one to a page. The existing ones are fine, but the new one doesn't appear. Hover shows the effect and description and click opens the photo.

https://www.historyreenactment.org.uk/coam.html

Thanks