2x DS18b20 on Fibaro Smart Implant Null Pointer

[cren90]

9:25:42 PM: error java.lang.NullPointerException: Cannot invoke method ds18b20Refresh() on null object @line -1 (refresh)
9:25:41 PM: error java.lang.NullPointerException: Cannot invoke method ds18b20Refresh() on null object @line -1 (refresh)

I just included my Fibaro Smart Implant which has 2 DS18b20's with a 4.7k Ohm pulldown resistor between red/brown and yellow/red running on 12v DC. The device shows Connected in my smartthings app but trying to see any temperature data fails.