The printer is displaying the message: The UV LED calibrator detected some light on a dark display. This means there is a light 'leak' under the UV calibrator, or your display does not block the UV light enough. Please check the UV calibrator placement on the screen or replace the exposure display.
Error name: UV LED calibrator error
Error code: #10314
It must be connected to the front USB port when instructed or before the calibration has started. Also, the lid should be closed to prevent any light leak from the outside.
If the calibrator is placed correctly, the print display, which is a consumable and will degrade over time, has burned out areas that will not block or let light through. It is rated for 500 hours of printing. In this case, the print display must be replaced.