GSK218MC-H and GE2050T-LA1 User:
On GSK218MC-H Display servo alarm 0404 :Axis 3
GE2050T-LA1 Driver Alarm 04 : Position out of tolerance

CNCmakes Support:
It looks like there was a crash.

For this case
1- Please turn off the power for both CNC and drivers.
2- Restart the power for CNC and drivers at the same time.
3- RESET
4- Move the axis back.