Admin section problems

I’ve been using this plugin for several years and haven’t had to access it. I did today and see that iFrames aren’t showing all the content. When I went to the ADMIN PAGE none of the tabs work when I click them. And if I change an option there’ no button to update so I can’t even experiment with longer iframes.

The two errors I’m getting in Devtools are:

Uncaught ReferenceError: aiInitAdminConfiguration is not defined

and

Uncaught TypeError: Cannot read properties of null (reading ‘1’)

How can I fix this?

THANKS!