@Collector74, Welcome to the HP Support Community!
Check if the protective plastic tape from the ink cartridge is removed before inserting it into the printer. The Instant Ink cartridges are not available in stores.
Make sure the printer is connected to the internet for the Instant ink servers to monitor the ink levels and send the ink cartridges when required.
You may refer to this document for more info.
Also, have you checked your HP Instant Ink account page? Your Instant Ink account page will have notifications if there are any issues with the account or recent cartridge shipment, it will even provide solutions on how to fix the issue. You may log in to your HP Instant Ink account page from here.
As the issue is related to Instant ink cartridges, I need more information to help you out.
Since the instant ink account details are confidential, please send me the required information via private message.
I am sending you a private message with the information required.
Let me know how this goes.
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KUMAR0307
I am an HP Employee