AT&T Now Science Channel no refresh token

I had been getting the Science Channel regularly with AT&T Now. But as of yesterday, it isn't working. I'm getting the same no refresh token message that was reported in a similar thread

I did try rescanning the channels. No luck with that.

I'm now seeing that this might be an issue across providers.

This has been reported over and over again do a search.

Official answer from Channels dev is here