Hi @MMICHIELS
Welcome to the HP Support Community. I'd be happy to assist you with the Instant Ink issue.
Please try these steps to perform a printer reset -
1) Take out the cartridges.
2) Unplug the power cord from the printer & wall.
3) Wait for 30 seconds.
4) Plug the power cord back into the printer and wall, ensure the printer is plugged into the wall & not to a surge protector.
5) Insert the cartridges back into the printer.
Also, try updating the printer's firmware. Refer to this document for steps - HP Printers - Updating or Upgrading Printer Firmware
If the issue still persists, please send us a private message with your Instant Ink account details or you may also respond to the private message I've sent out and I'll help you out, accordingly. Check next to your profile Name, you should see a little blue envelope, please click on it.
Hope this helps! Keep me posted.
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Have a great day!
Asmita
I am an HP Employee