How can I troubleshoot a Wi-Fi connection problem causing error E7?

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Grade: Education Subject: Support
How can I troubleshoot a Wi-Fi connection problem causing error E7?
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First, ensure your Wi-Fi router is working correctly. Restart it. Then, restart the HP Smart Tank 500 by turning it off and on again. Next, re-pair the printer with your Wi-Fi network through the HP Smart app. Finally, check for firmware updates for both the printer and the app.