https://www.hpprintersupportpro.com/blog/stop-my-hp-printer-from-going-offline/

Hey There, I am Alpha Jenner. It's really very frustrating when you have an HP printer offline error. This is a very common issue encountered by almost 50% of users globally. If you are looking to solve this error then you can implement the below solution. Restart the HP printer and router to get rid of this error Connect Wifi Network with a wireless printer.