Hello and Welcome to FixYa Sir.
Paper jam Error is very Generic issue, it usually starts due to a real Jam and remain there even after removing it. You need to check a number of things to get to some solution. I'll advice you to follow all the instructions given on the links below. Even if you have done it already, do them again precisely, you may be missing something.
Kindly navigate to the link according to the Error you are facing, and follow the instructions there.
If you have any Confusion, questions or issues regarding your problem do tell me.
Thank you for using FixYa!, Keep visiting..
If you think I was of help, your token of appreciation in the form of rating and a testimonial will be esteemed.
Concerned, Nooh