The E60 error on a Brother embroidery machine can have a few possible causes:

1. The motor or the circuit board that controls the motor is malfunctioning.
2. There is a problem with the embroidery hoop or the embroidery arm.
3. The machine’s firmware needs to be updated.

To fix the E60 error, you can try the following steps:

1. Turn off the machine and unplug it from the power source for at least 30 seconds.
2. Check the embroidery hoop and arm to make sure they are properly installed and not obstructed.
3. If the problem persists, try updating the machine’s firmware.
4. If none of these steps work, there may be a problem with the motor or circuit board, and it is best to contact a Brother authorized service center for further assistance.