I do have access to the database that WordPress is using. Is TablePress data in that database? I didn’t see it when I was looking in there. Where would I find the TablePress data?
Since common links span many of my tables, exporting CSVs would be even more time consuming that searching through WordPress site and editing tables manually.
I deactivated all the plugins on your list and the issue persists. I have no HTML in the HTML JS adder. I used to use that, but not anymore. I deactivated it.