Did you make changes or update the operating system? Or did you change the wifi settings or upgraded your wifi modem? The only steps i can suggest to you right now is to first try to perform a power reset. Ie, unplug the power cable from the rear of the printer while the printer is still turned on and reconnect and try to see if that resolves the issue, if not i would suggest uninstall the printer drivers from your computer and download the full feature software driver and software from the hp support website and install and update the firmware of the printer which will be available on the hp website.
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