thumbnails not appearing in subdomain media dashboard – dev site for

I was working with Abdul Wajed but was disconnected from the Chat, not sure how to followup. I already initiated support access for him.

The issue is that my media library does not appear correctly (see attached). When i click on one of the blank squares, I see some image meta content, but no image appears unless I click “Edit” (also attached screenshot). When i upload an image through “Featured Image” for a post, the image will sometimes appear immediately on the list view of a post, but in all other instances the images don’t appear on the site for at least a few days (note absent logos on subdomain sites except for “Events…” network site.

Note: I still get this error when I disable all plugins and switch to twenty nineteen theme.

Please check chat notes for more info.