When you see your HP printer in error state, it simply means there is some serious issue with your printer. Most probably, it is not connected to a network or you haven't turned it on properly. In this case, you should power reset your HP printer or install the latest printer drivers on your device. To get your printer out of error state, you should also verify that you have not set your printer to be used in offline mode. Else, make sure that your HP printer is set as the default printer.