Support Code 300 error message trying to print from my Canon MX922 printer.

Same irritation and annoying issue getting a Support Code Code 300 error message trying to print from my Mac or iPhone to my Canon MX922 air print printer. NEVER had a printing issue whatsoever, until purchasing and adding a 2nd printer (exact same printer) for my spouses office (also using a MAC). I HAVE DELETED AND RENTERED THER PRINTER, INSTALLED THE LATEST DRIVERS, Same irritating/annoying issue getting a Support Code 300 error message trying to print from my Canon MX922 printer. NEVER had a printing issue whatsoever, until purchasing/adding the same printer to my husband's office (also with a MAC). Please advise. I have deleted and reentered the printer, installed the latest drivers and nothing seems to help. The other issue I am having is print jobs are wanted to be sent to my spouses printer vs mine, even though mine is set at default for my computer. HELP!!!!