turbo2ltr

Thank you, works perfectly!

didn’t make any difference.

Turns out the galleries that were missing their thumbs didn’t have 777 permissions. When you tell the plugin to regenerate thumbs in the gallery interface, it would be nice to have a check and error displayed if it can’t actually write the thumbnails instead of making it look like it completed successfully. It would have saved me HOURS of work.

I’m not sure what you mean. The gallery page is a page, not a post.

Are you saying change page_id=83 to “/gallery”?

Well those are real examples except for the domain.

see here
https://www.chrisbelczynski.com/?page_id=83