Last Wednesday and now today my C-4 Hub's web UI and dashboards showed up with the "red" checkmark. When I tried to log into the Hub I got the login screen but wouldn't go past the login screen. I had to go to the recovery screen and reboot the hub. I can run months on this hub and the only changes made was adding the Tempest socket driver from @augoisms back in the beginning of July.
Looking at the logs I see nothing out of the ordinary except for a Websocket error showing a socket timeout for both my Harmony Hub and the Tepmptest and it appears that other functions such as receiving updates from devices were working.
dev:6542020-08-18 07:12:10.243 pm infoSent list_start for 74597
dev:6542020-08-18 07:12:10.100 pm infowebSocket is open
dev:4282020-08-18 07:12:10.055 pm infowebsocket is open
dev:4282020-08-18 07:12:09.484 pm infoinitialize() called
dev:4842020-08-18 07:12:08.634 pm infoHub is 1597795928521 aka Tue Aug 18 19:12:08 CDT 2020
dev:4842020-08-18 07:12:08.621 pm infoNTP Server returned time of 1.5977959301886763E12 aka Tue Aug 18 19:12:10 CDT 2020
dev:4842020-08-18 07:12:06.116 pm infoExecuting 'configure()'
dev:6542020-08-18 07:12:04.662 pm infoinitialize()
dev:4282020-08-18 07:09:40.489 pm warnWebSocket connection closing.
dev:6542020-08-18 07:09:40.425 pm warnwebSocket connection closing.
Identified the non-responsive dashboards here and rebooted via recovery page
dev:4412020-08-18 07:05:17.516 pm infoMaster Bedroom-Outlet is on
dev:2292020-08-18 06:51:16.490 pm infoOffice Button battery is 84%
dev:3142020-08-18 06:48:28.772 pm infoKitchen-Leak Sensor temperature is 75.62°F
dev:3102020-08-18 06:14:39.542 pm infoMaster Bathroom-Leak Sensor temperature is 78.86°F
dev:3132020-08-18 06:09:05.087 pm infoBasement-Leak Sensor battery is 90%
dev:3242020-08-18 05:33:09.952 pm infoKitchen-Siren switch is off
dev:3242020-08-18 05:33:09.937 pm infoKitchen-Siren status is off
dev:3242020-08-18 05:33:08.287 pm infoKitchen-Siren switch is on
dev:3242020-08-18 05:33:08.247 pm infoKitchen-Siren status is chime
dev:2292020-08-18 05:28:43.143 pm infoOffice Button temperature is 81.74°F
dev:4422020-08-18 04:53:03.563 pm infoMaster Bedroom-Button temperature is 85.09°F
dev:3022020-08-18 04:06:20.161 pm infoUpstairs Bathroom-Leak Sensor temperature is 79.04°F
dev:4422020-08-18 04:00:05.289 pm infoMaster Bedroom-Button temperature is 84.17°F
dev:3242020-08-18 03:57:13.246 pm infoKitchen-Siren switch is off
dev:3242020-08-18 03:57:13.244 pm infoKitchen-Siren status is off
dev:3242020-08-18 03:57:11.584 pm infoKitchen-Siren switch is on
dev:3242020-08-18 03:57:11.544 pm infoKitchen-Siren status is chime
dev:3102020-08-18 03:49:11.314 pm infoMaster Bathroom-Leak Sensor temperature is 77.96°F
dev:3112020-08-18 03:42:37.808 pm infoPowder Room-Leak Sensor battery is 87%
dev:4282020-08-18 03:30:48.886 pm infowebsocket is open
dev:4282020-08-18 03:30:48.827 pm infoinitialize() called
dev:4282020-08-18 03:30:40.808 pm warnfailure message from web socket failure: No route to host (Host unreachable)
dev:4282020-08-18 03:30:37.781 pm infoinitialize() called
dev:4282020-08-18 03:30:33.748 pm warnfailure message from web socket failure: No route to host (Host unreachable)
dev:4282020-08-18 03:30:32.701 pm infoinitialize() called
dev:4282020-08-18 03:30:30.663 pm warnfailure message from web socket failure: sent ping but didn't receive pong within 30000ms (after 676 successful ping/pongs)
dev:4422020-08-18 03:25:52.724 pm infoMaster Bedroom-Button temperature is 83.25°F
dev:3142020-08-18 03:08:08.535 pm infoKitchen-Leak Sensor temperature is 76.54°F
dev:4842020-08-18 03:00:00.257 pm infoHub is 1597780800236 aka Tue Aug 18 15:00:00 CDT 2020
dev:4842020-08-18 03:00:00.252 pm infoNTP Server returned time of 1.5977808044535154E12 aka Tue Aug 18 15:00:04 CDT 2020
dev:3142020-08-18 02:53:49.124 pm infoKitchen-Leak Sensor temperature is 75.60°F
dev:3142020-08-18 02:38:23.709 pm infoKitchen-Leak Sensor temperature is 74.65°F
dev:3122020-08-18 02:19:59.987 pm infoLaundry Room-Leak Sensor battery is 100%
dev:3112020-08-18 02:02:53.500 pm infoPowder Room-Leak Sensor temperature is 74.61°F
dev:4422020-08-18 02:00:55.263 pm infoMaster Bedroom-Button temperature is 82.35°F
dev:3012020-08-18 01:58:17.127 pm infoMichael Bedroom-Button temperature is 81.13°F
dev:4262020-08-18 01:43:00.439 pm infomZone-All House-Motion Zone is active
dev:3142020-08-18 01:39:12.991 pm infoKitchen-Leak Sensor battery is 87%
dev:3022020-08-18 01:15:16.306 pm infoUpstairs Bathroom-Leak Sensor temperature is 78.14°F
dev:2292020-08-18 01:12:56.715 pm infoOffice Button temperature is 82.64°F
dev:3102020-08-18 01:08:17.550 pm infoMaster Bathroom-Leak Sensor temperature is 77.04°F
dev:2032020-08-18 01:00:03.396 pm infoTest-Leak Sensor temperature is 79.22°F
dev:4262020-08-18 12:52:56.008 pm infomZone-All House-Motion Zone is inactive
dev:4422020-08-18 12:52:28.363 pm infoMaster Bedroom-Button temperature is 81.45°F
dev:4422020-08-18 12:51:16.851 pm infoMaster Bedroom-Button battery is 69%
dev:3102020-08-18 12:33:38.150 pm infoMaster Bathroom-Leak Sensor battery is 87%
dev:2292020-08-18 12:12:17.252 pm infoOffice Button temperature is 81.74°F
dev:3242020-08-18 12:00:03.782 pm infoKitchen-Siren Battery is 32%
dev:3242020-08-18 12:00:01.513 pm infoKitchen-Siren Battery is 32%
dev:2032020-08-18 11:22:56.132 am infoTest-Leak Sensor temperature is 78.28°F
dev:3112020-08-18 11:13:26.290 am infoPowder Room-Leak Sensor temperature is 73.71°F
dev:3022020-08-18 11:02:53.456 am infoUpstairs Bathroom-Leak Sensor battery is 24%
dev:3012020-08-18 10:50:20.222 am infoMichael Bedroom-Button battery is 86%
dev:2292020-08-18 10:44:04.922 am infoOffice Button temperature is 80.82°F
dev:3252020-08-18 10:31:21.861 am infoFront Door-Lock battery is 99%
dev:2032020-08-18 10:21:07.762 am infoTest-Leak Sensor temperature is 77.38°F
dev:4842020-08-18 10:00:00.210 am infoHub is 1597762800197 aka Tue Aug 18 10:00:00 CDT 2020
dev:4842020-08-18 10:00:00.209 am infoNTP Server returned time of 1.5977628041147126E12 aka Tue Aug 18 10:00:04 CDT 2020
dev:4282020-08-18 09:51:30.641 am infowebsocket is open
dev:4282020-08-18 09:51:30.560 am infoinitialize() called
dev:4282020-08-18 09:51:22.535 am warnfailure message from web socket failure: No route to host (Host unreachable)
dev:4282020-08-18 09:51:22.259 am infoinitialize() called
dev:4282020-08-18 09:51:18.236 am warnfailure message from web socket failure: No route to host (Host unreachable)
dev:4282020-08-18 09:51:17.146 am infoinitialize() called
dev:4282020-08-18 09:51:15.093 am warnfailure message from web socket failure: sent ping but didn't receive pong within 30000ms (after 495 successful ping/pongs)
dev:2032020-08-18 09:37:30.817 am infoTest-Leak Sensor battery is 87%