Sometimes the 'paper out' message happens even if the paper is loaded. Try removing the paper and reloading it, making sure it's aligned properly and not overfilled. Check the paper size and type settings in the printer menu to ensure they match what you’ve loaded. Also, inspect the paper tray for any debris or obstructions and clean the paper feed rollers gently with a damp cloth. If none of that works, there might be a sensor issue and contacting Epson support could be the next step.