…just in from support:
“Thanks for letting us know you are getting the “Sorry, an unexpected error has occurred” error. We have identified an issue with in the Android app when editing routines, creating a custom rule in SmartHome Monitor, editing SmartLights, and making adjustments in Rule Machine on some account. Engineers are working to identify what is causing this issue on accounts experiencing it, and are working on a resolution. We will follow up with you once resolved, and appreciate your patience.”