Hi, just to paint a better picture here.
As said a few days ago I have/had the same problem. I couldn’t batch create or update at all (I’m working on a Mac) . Never worked in the past either, but I was not bothered about it. Recently I tried it and it didn’t work from the desktop (in neither versions) nor from the browser which is Safari (excuse my ignorance, is Safari Chromium based?).
Reading this thread I downloaded firefox and it works, both ways, from desktop and from browser.
Thanks