I got an email that there was an update to my application on the IRCC portal. My application was done online. When I logged on and checked, the status read "Returned," and the reason was "other". I clicked into the application, and it said:
Application status: Returned
One or more of your items need to be corrected. Check below for details.
Other - Your photos do not meet the specifications (poor image quality) – please review Guide IMM5445.
They didn't provide me with any other instructions, other than stating that it needed to be corrected. I'm not sure what makes the photo have poor image quality; I had it taken at Shoppers Drug Mart. I had to scan the photo instead of it being digital, so maybe that is an issue.