It could be, then, that (depending upon the printer's age and degree of use) that the paper pickup rollers, that swiff the topmost paper sheet off the paper stack, have become slippery with age.
That could be remedied with a cleaning. Here's how to do that sort of roller cleaning
in the problem area where feeding is not happening:
Remove all paper from the machine, unplug it, and open it so as to have access to the rollers in the problem area where feeding is not being done properly.
Take a clean high-quality lint-free rag cloth, moisten it with rubbing alcohol, and rub the rollers firmly all over their paper-contacting surfaces, three times over.
(If the rollers are hard to reach, there is another way to clean them... let me know if that is the case, and I will detail how to do the cleaning.)
Allow 5+ minutes for drying-off, then reload the paper, close up the machine where you opened it up, and then try again.
How does that do, for the problem?