The document was not fed.
Paper dust has accumulated on the surface of the Pick-up Roller or Separation Pad.
Clean the Separation Pad and Pick-up Roller.
Too many documents are loaded in the document feeder at a time or your document is too thin or too thick.
Make sure your document is acceptable for the machine.
There are foreign objects in the document feeder.
Remove any foreign objects or ripped paper from the document feeder.
Remote Setup is in process.
Cancel Remote Setup.
Paper ejection has paused.
Finish ejecting the paper.
The Separation Pad Cover is not properly closed.
Securely close the Separation Pad Cover until the hooks fit into the Front Cover.