New station broken (only in Gradio)

[garuffalo]

When trying to create a new station for WCBS Newsradio 880 AM in Gradio, the station comes up as broken.

All info is carefully entered using a compatible URL: http://playerservices.streamtheworld.com/pls/WCBSAMAAC.pls which plays in VLC, Radio Tray and Clementine on Linux Mint 18.3. Also plays in iTunes on a Mac.

New station is broken immediately. Never has worked. I have successfully created a new station in the past.

Tried to create the station several times, using slightly different names. Waited until the unplayed stations were automatically deleted. Tried again. No luck.