There might be numerous reasons why you are facing the offline printer problems. There is a gap in the communication of your printer with your Personal Computer, then you are tend to face this error. However, to troubleshoot this error and to get your printer back to online mode from offline, you need to first check and see if your printer is connected to a stable Wi Fi connection, and that it is the same connection that your device is connected with. Then, you have to Run a printer power cycle and finally restart your computer. Your printer will be back to online mode.