HTML import is broken in latest version

I recently updated to the latest version of TablePress and now HTML import does not work for me. I usually create an HTML table from an Emacs org-mode table, and that has worked fine in the past. But now it does not, with TablePress version 1.8.1.

I cleaned up the HTML code produced by org-mode export so that it was a bare table (no headers and such) but still no dice.

Help would be appreciated! Thank you.