Hello. My name is***** can help you with your question.
This usually indicates that your printer is no longer connected to your network. Are you able to print to the printer from a computer? If the printer was working under air print before then we know it's compatible as long as it's connected., So you should not need any type of an update to the printer – just make sure it's connected to your Wi-Fi network. If it is and it still isn't working, then I would suggest rebooting your router and then connecting again.