Hubitat - actiontiles stuck on INIT after working fine for many weeks - Initializing SmartApp Version: 6.10+002-Prod

After working fine for many weeks, I went this morning to authorize an additional device in Actiontiles and now the app shows "INIT" and won't go beyond INIT, and I see "Initializing SmartApp Version: 6.10+002-Prod" in the logs over and over. I have rebooted my hub, updated the connection on the actiontiles side, and none of this is making any change.