Can't record audio in course editor

I’m creating a simple Esperanto vocabulary course and I want to add audio to the cards. I’m unable to do so. I’ve tried Chrome, Opera, and Edge, all in Windows 11.

When I try to record, I get the countdown and then I record, but when I try to play it back there’s no sound. The microphone permission is set, so that’s not the problem, and the microphone is working, since I can use it to create files to upload to Memories, and they playback fine. But creating and uploading audio files is quite cumbersome. I’d like to be able to record in the web course editor.