Hello Mhamed,
If you have not made any network setting changes and you lost connection, I would suggest trying to refresh the connections by unplugging the router from the power for 5 seconds and then plugging it back in. Once the network is back up, you can try printing again to see if the devices can find the printer. If it is still unable to print, I would suggest trying to reconnect the printer to your network. You can view the steps for network connection using the steps in the link HERE.
If you continue having issue connecting to the printer, you can contact our support team at 1-800-652-2666. Our agents would be happy to assist. If you would like to continue with support through the forums, please reply to this message with the operating system on the computer and what type of phone you have and we can provided some additional troubleshooting suggestions.
