When a printer is offline(hp printer offline, it is unable to communicate with the source of the print job. there could be: Old drivers and connectivity problems. These guidelines will cover a number of topics. To find and fix issues, use the HP Print and Scan Doctor programme. If asked, select Yes to trust the file source. Then select your printer by clicking Start. The application will highlight any possible connection problems.
https://printersofflines.com/hp-printer-offline/