If your HP printer isn\’t printing, common issues could include a lack of paper or ink, a paper jam, or a connectivity problem. Ensure the printer is connected to the correct network or device, check for any error messages, and verify that the printer driver is up to date. Restarting both the printer and computer can also help resolve the issue.
Source: https://medium.com/@fixprintererror/why-is-my-hp-printer-not-printing-4baa5bcd4bf5