TV listings "No Information" on Cable Boxs

I have 2 Samsung GX-SM530CF Cable Box/Streaming Media Players with Cox's cablecards and tuner adapters. Both units show "No Information" when trying to view the TV listings. This started on both units at the same time on Jan 22. I'm getting all the channels I'm supposed to, and the Internet services (Netflix, Amazon Prime, etc) are still working fine. The tuner adapter light is steady green, but no TV guide. I've tried resetting them, but still "No Information". Did Cox change anything with the guide?