On my HP OfficeJet Premier Pro 9019 (only one and half years old,) I received a paper jam message "The original is jammed in the document feeder. Open the cover, remove and reload the original, and then try again."
I have followed all steps in troubleshooting: checking for jams in all feed areas, cleaning all the rollers with a damp lint free cloth, removing all ink cartridges and reinstalling them, removing paper tray, shaking the printer (and cursing it) in case debris got on a feeding sensor, while it was powered on - pulling the power cord from the back and waiting 10 minutes and later for 30 minutes, using the troubleshooter on HP smart, going through the automated help features, attempted to do a hard reset and checked for driver/software updates.