Debug courtesy of tachonight/Ron Olson on #hotmetalshop slack
Message: *Button only permitted when machines is in state(s): referenced and idle, g-code program paused, g-code program running*
Check
1. Is the blue light on the button by the power switch?
2. Did you hit the reset button in pathpilot?
3. Does the torch move on the Z axis?
4. Is the "Machine OK" status light on?
5. Did you reference X, Y and Z?