Just downloaded the client and updated both the client and my K70 SE.2!
I am on a MacBook Pro on Mojave.
As of right now, all the actual letter keys work. When I click space bar it infinitely keeps spacing and the keyboard does not allow any other key presses. The backspace key does not register at all. I don't know what else does not work since these basic things currently don't work, but I'm assuming many other things are not registering correctly.
Any one have any ideas?