The "(ERROR: TVAPP-00101)" problem is part of an outage in my area. I talked to a few of the XFINITY agents.
They have already received many calls on it, and are aware of that particular error code. They informed me that they with update me on my cellphone and e-mail when the problem is corrected.
All of my ROKU devices are affected by this. My personal opinion is probably the new routers that they handed out to everyone has a bug in it from a recent software update, and won't allow in-home devices to have access. My ROKU is literally within 20 feet of my router.