Solutions
Perform the nozzle check, and then try Cleaning or Power Cleaning if the print head nozzles are clogged.
Make sure the paper size in the print settings matches the actual paper size.
See the following to prevent multiple sheets of paper from being fed into the printer at the same time.
Several Sheets of Paper are Fed at a Time
If the paper is curled or the edges of the paper are folded, it may touch the print head and be fed at an angle.
Place the paper on a flat surface to check if it is curled. If it is, flatten it.