X Axis Driver Not Ready

AC Servo Driver User:
The driver of X axis shows NOT READY, alarms for err9, what should I do?
CNCmakers Support:
Err9 means encoder issue, check encoder and wiring.
AC Servo Driver User:
The driver of X axis shows NOT READY, alarms for err9, what should I do?
CNCmakers Support:
Err9 means encoder issue, check encoder and wiring.