Can't Edit Content

Hello–

My client just noticed that some of his accordions had their titles, but the dropdowns were blank. When I opened Accordions to see what was breaking some of the dropdowns (because some on the page still function), the tabs for editing exist, but there’s no way to edit the accordions. Please see this screencap: https://www.preposterousuniverse.com/wp-content/uploads/Screen-Shot-2016-07-20-at-6.-51P.png

I’m afraid if I try to edit any of the accordions that still have content that I’ll lose them as well. Can you please advise? I have deactivated all plugins–there doesn’t appear to be a conflict.

The page I’m concerned about is: https://www.preposterousuniverse.com/research/annotated-publications/

Thank you.

https://ww.wp.xz.cn/plugins/accordions/