Shows Play in App; Not Browser

I have 15 recordings in Channels. The files are in the folder they're supposed to be and play locally in VLC. They also play fine in the Channels iOS app.

When I try to play on desktop via web browser, it fails. On playing the browser plays sits at "reconnecting", and the log shows many copies of "[HLS] Couldn't generate master playlist: Couldn't probe recording"

I tried turning on and off "Web Player Adaptive Streaming", no change. Tried Chrome and Edge, no change. The troubleshooting checks all show as green. Logs submitted ending f1c2e5

Try updating to the prerelease using the Check for Update drop down

Beta worked - thanks!