The video is not available. A Ring plan or trial was not active when this event took place

On an outdoor Ring stickup camera that worked fine for several months, now getting this error message:

“The video is not available. A Ring plan or trial was not active when this event took place.”

roughly 10% of the time. My Ring plan is definitely active. This is observed viewing events from the ring.com dashboard.

The other 90% of the time when I can view the camera events, they randomly drop several seconds of video in the middle of a clip, and the resolution appears to drop to something hardly usable.

I have tried without success to reach Ring support via Chat and phone.

Disappointing.