When you export your file, once you got to the PW prompt stage, the cursor was always in the PW field box, so all one had to do was start typing. I noticed today the cursor is NOT there, requiring me to click in the PW field to focus it, then proceed. I export every three weeks, so something has changed since then.
I would suggest reporting this on Github.
P.S. I can reproduce it in the browser extension, as well.