Why does my HP Envy 7155 printer keeps saying out of paper?

[Antonio] March 25, 2020
Query
Every time my HP Envy photo 7155 all-in-one series printer keeps saying out of paper error. The input tray has already been filled with 20 sheets. I don’t know what is wrong. I have unplugged it twice, turned it off, and even taken the paper out, still facing the same error. Please help.
Response
Thank you, Antonio, for writing us the printer issue. This paper-related error is fixable easily with the help of our blog – how to resolve HP printer says out of paper error.
By Technician-[Martin Lindsey]