The printer is displaying the message: Print mask is missing.
Error name: Mask no avail warning
Error code: #10709
This error shows when the print mask part of the project is corrupted.
The mask file can be corrupted when the project file is manually edited, or an error with the USB drive.
Export the project again to revert the changes made to it. In case the issue persists, change the USB drive that has been used to transfer the file to the printer.