Suddenly, my login credentials quit working for XFINITY hotspots, any device, any hotspot.

About 2 days ago, my win 10 laptop AND my android tablet stopped getting internet connectivity through my usual multiple XFINITY hotspots around town, including the one in my house. A connection is established to the wireless router, but the android says "Couldn't get IP address" and the laptop says "connected, no internet." All devices work fine otherwise, including the wifi network on the same xfinity router in my house which also broadcasts the hotspot.

Seems to me the central xfinity network won't give my login an ip address for some reason, although I have no idea why that would have changed... my account is on auto-billing, has been working fine 17 months since it was installed. Probably irrelevant: my neighbor signed up recently. I also noticed the android app showing XFINITY hotspot locations no longer lists one at my address.

Any ideas or help is welcome.