Hii my name is Luna Fallon i am from the technical team if you are facing a problem then you can visit our site. Your HP Envy printer may be offline due to several reasons such as a poor network connection, outdated printer drivers, and issues with printer settings. If the printer is connected wirelessly, it may lose connection due to a weak signal or a change in network settings. Outdated printer drivers can also cause the printer to go offline. Additionally, incorrect settings on the printer, such as being set to "offline" or "sleep mode", can also cause it to go offline. Troubleshooting steps may include checking the network connection, updating drivers, and ensuring correct settings on the printer.