Welcome to the HP Forums. I would be happy to help you with your HP Photosmart 5520 printer. I understand you are getting out of paper error message and you have already done some preliminary troubleshooting.
Don't worry though as I have a few steps to determine the issue and find a solution as well,
Check the condition of the paper and reload it.
Clean the rollers.
Reset the printer.
Click here and follow the steps mentioned in the document to fix this issue.
Let me know how it goes.
Sandytechy20 I am an HP Employee
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