I've tested this on my PC and my iPhone, just started today.
I try to play any recording and get the error. I'm asked if I'd prefer to watch the item On Demand, I say yes, it tells me it cannot play that either.
I've tried logging out and closing my browser to clear the cache, on my iPhone I logged out and closed the streaming app. No good. I also can't stream live TV on these devices.
Basically, the streaming service is toast.
UPDATE: Just tried something. Took my iPhone off the Xfinity wifi network, and when I'm on a cell network.... Everything works. Going to try rebooting the XFinity device next...
I'm having the same problem. Service was fine this morning & then around noon I started getting the error messages. I'm attempting streaming on my laptop in the Microsoft Edge browser. I'll check to see if it works on my cell phone on cell service & on wifi. And I'll reset the wifi router. Have you had any luck? Any updates?
Nope. No luck.
On the XFinity network I can't stream on any of my devices. NOW I get a DRM error "Playback Issue :: 100000" when I try to stream live TV.
On a different network, I can.
I guess I'll call their support.
Another update. While talking to support, live tv streaming started working, and on demand streaming started working.
I still can't stream recorded items on my cloud DVR, but that appears to be part of a larger outage.
My services just started back working around 8pm. Turns out there was some sort of issue in my zip code, so I guess the Xfinity guys did their thing & got it all fixed up. Everything seems back to normal. I hope your issue got resolved also.