Printing start encountered key: 2111 Unknown Exception.
2.1 Using third-party slicing software for slicing, printer start G-code settings incorrect.
2.2 Print slicing software did not select the Ender-3 V3 KE model.
3.1 Test the slicer file in the random data set.
3.2 Install the slicing software included in the random materials; select the 3V3 KE model and use the default parameters for slicing and printing.