User Activity

Getting an error message saying put in correct print head. Its the one that came with it and it was working fine yesterday. Now it wants me to do this. I took it out and cleaned the print head and dried it off and put it back in. Still the same thing...
It just started showing me an error message about print heads saying I need to put another one in and correct it.This never happened before and its the same one that came with the machine. Can I get this corrected?Sherry