Please press the button on the top of the printer to label-calibrate, the red light will turn into blue light.
Please press both sides of the cover with both hands, and press it at the same time, you will hear a click, and the red light will turn blue.
The label file size and the printer setting label size do not match. Please check the printer setting label size.
The file size is inconsistent with the printer size or the latest version of the driver needs to be installed.