My Kyocera Mita printer suddenly stopped printing halfway

Hello, my Kyocera Mita model KM-1815 printer is having some problem. I printed a page easily but the machine suddenly stopped printing the next page. It did not print and showed an error code C6020. I contacted the customer care but they could not tell me the solution. Do you have any kind of information regarding this problem? If so, then please let me know. Suggestions regarding the solution for this issue is much appreciated. Thanks.
