Preview in Embed Widget Not Working in Safari

Can see files in folder but cannot preview them using Safari Version 16.4 (18615.1.26.11.23).

Works in Firefox and Chrome.

I'm using the latest embed widget. They were previously showing and I've done nothing to the embed code or the files.

Constant rotating circle or the message "We’re sorry, the preview didn’t load. Please refresh the page."

Refreshing doesn't work.

Any help would be appreciated.