What OS and browser are you using? Are you running any JavaScript blocking extensions?
First, I really appreciate the superquick responses. Problem not solved yet, though.
I've sold stuff here before without problems, but I think it was before the new Classifieds format.
OS is Mac Mojave 10.14.6.
Now, I've tried creating this listing on Firefox, Brave, Opera, Vivaldi and Safari. Each one has AdBlock Plus or assorted other blockers: Ghostery, UBlock, their own popup blockers.
BUT I have disabled (or marked "trusted") everything available for head-fi.org .
I had uninstalled Chrome a long time ago because the geek press said it was doing too much surveillance. (Brave is Chromium-based but doesn't report back to Google).
But per
@MrWalkman , I just reinstalled a completely fresh copy of Chrome, no customization at all, freshly unboxed, unregistered. And as with the other browsers, I got the pop-up list, but nothing would populate the field. Instead:
Oops! We ran into some problems.
- Please enter a valid message.
- Please select a prefix.
Any thoughts?