Is anyone here that is receiving that error also using Samsung SmartThings? The routines built into SmartThings are labeled the same as the routines in the Alexa (i.e. good morning, good night, etc.) so when Alexa does a scan for new scenes in the Smart Home tab, it automatically pulls in the routines from SmartThings, even if you have not set the SmartThings routines to do anything. So when you are trying to set up the routines in Alexa, Alexa cannot execute the routine because there is already an Alexa scene with the same name (the scenes that it scanned from SmartThings). Maybe go into your list of Scenes in the Alexa app and disable the SmartThings routines it picked up (Good Night!, Good Morning!). Maybe then Alexa can perform the routine since there would not be two scenes with the same name.