I noticed that with SignalRGB running, I cannot use the #~ key
This is for the UK keyboard - it seems that the scan code is just ignored. Obviously this is an important key!
well, the light is working on that key but the key press value is ignored when signalRGB is running.
What is wrong?
Good evening 
I have the same issue on a Corsair K95 RGB Platinum, but with my azerty keyboard it is the * key (close to the return key, the same as your #/~) that is not working.
With signalRGB off it works.
Go to Devices, keyboard, settings and set layout to ISO…