Thanks. I don't see it when I save the page as HTML and open the file in BBEdit. When I inspect the element as you suggest, however, I do see it. But the macro still didn't work, so I tried asking ChatGPT how I might revise it. It said, somewhat surprisingly, that I should use an Execute JavaScript in Front Browser with
document.getElementById('prompt-textarea').focus();
in place of the Focus Front Browser Field action proposed here. "This method directly triggers the focus on the text area and can be more reliable than XPath-based actions, especially if the page structure changes slightly."
I tried following this suggestion, but the macro still didn't work. In Google Chrome, however, it works with both of the actions. So it looks like something changed in Brave that messed up the original macro's functioning. I'm provisionally opening ChatGPT in Chrome, then, though I'd prefer to stay in Brave. I may ask about this on a Brave forum.