Indeed, a recent firmware update on the Philips Hue bridge seems to have broken the Hue2 plugin when the manufacturer was renamed from “Philips” to “Signify”. Here is a fix. Just unzip this file and drop L_PhilipsHue2.lua over your old one in apps -> Develop apps -> Luup files and you should be back and running.
I have already informed Vera tech support of this issue.
L_PhilipsHue2.zip (15.4 KB)