Buggymail error

Anyone know what is this error I see in my log?
Shows up early in the bootup, and regularly after that.

ERROR:GetString: error reading /sys/firmware/devicetree/base/buggymail

Nothing to worry about if you are not experiencing any problems. If (when) you upgrade to Matrix and kernel 4.9 it should go away.

I would update but apparently the HDHomerun addon is not supported, which is deal-breaker for me. Tried using the TVHeadend backend, but most of the OTA channels from the HDHomerun tuner would not display using it.