problem with plugin

Getting this error with Hue Lights v1.8.7:

Hue Lights Error Error in plugin execution ExecuteAction:

Traceback (most recent call last):
File "plugin.py", line 10875, in setColorTemperature
AttributeError: 'unicode' object has no attribute 'formate'

It's strange because I'm sure it was working ok but has recently stopped.

Any suggestions please.

please update to the latest version
https://github.com/IndigoDomotics/Hue-Lights-Indigo-plugin/releases

Karl