Welcome to the HP Support Community. I understand you are not able to print wirelessly from your iPad. I'd be happy to assist you.
This error may display when the Embedded Web Server (EWS) has an expired certificate that is not accepted by the operating system. This certification is necessary to secure connections with AirPrint and Secure Internet Printing Protocol (IPPs). To prevent the error, generate a new self-signed certificate from the EWS:
1.) Using the printer’s IP address, go the EWS page > Networking tab. (tap the wireless icon on the printer to obtain the IP address)
2.) Expand Advanced Settings > Certificates > Configure > click on Create a New Self-Signed Certificate
3.) Click on Next and then click on Finish and then close the EWS window.
If the issue persists, restart the wireless router, the printer, and the iOS device.
Update the printer firmware
On the printer screen, go to Setup > Web services > Enable > Settings > Product updates
Click here to know different methods of updating printer firmware.
Also, check for any pending updates on the iOS device
Hope this helps! Keep me posted.
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KUMAR0307 I am an HP Employee
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