So the changer is working although I have not tried it with my echo yet. I noticed when I exit from changing the light color that its says “sorry, but there was an unexpected error”. I checked the log files and the best I could come up with is
"debug summaryData: [[icon:indicator-dot-gray, iconColor:#878787, value:Unconfigured]] - [[icon:indicator-dot-gray, value:Unconfigured, iconColor:#878787]]
I don’t know if this is from your smartapp or not. but I figured I would mention it.
Edit: Seems this may be common Sorry, but there was an unexpected error