Encountered this issue testing my Iris V3 and attempting to incorporate some logic from the Hubitat provided V3 driver on Github into my DH used with the Nyckelharpa app.
I concluded the issue is caused by the Device not having the "inClusters" set in the device then testing it with this code in the beep command
if (getDataValue("inClusters").endsWith("FC04"))
but did not report it or pursue it.
Since then, around Feb 6 2020, a change was made to the Hubitat Iris V3 driver code on Github removing that code in favor of a user defined setting. As of now, Feb 13, 2020, that change does not appear to be released.
If it was me encountering that error I would try the Hubitat Github DH version.
tagging @mike.maxwell
