The Label feed error message displays on the printer.
Cause
The leading edge of the labels or the notch between labels is not detected. The label supply is positioned incorrectly.
Troubleshooting
Reinstall the label supply making sure that the leading edge is securely under the ribs (at least up to the black line), and that the label supply covers the sensors: M710 - Load Labels and Ribbon.
Try another roll of labels with a different part number and/or lot number, if available.