A paper jam has occurred while feeding paper from a paper tray.
If paper jams occur frequently, clean the paper feed rollers. For details, refer to "Cleaning the Paper Feed Rollers (Tray 1/Tray 2/Tray 3/Tray 4)".
This procedure uses Tray 1 as an example.
If jammed paper cannot be found, check the positions of paper guides and paper stopper in the tray and ensure that paper is correctly loaded.