Print Cancelled seems to be mostly a wifi drop issue - the staff response to someone else with the same issue is here: Print Cancelled Alarm
If it was just a blip and doesn’t occur regularly I wouldn’t stress. Make an offering of 2 bits to the wifi gods and move forward. Likely there’s a new device (yours or a neighbors) that’s running on a similar frequency. If it becomes a constant annoyance there are things like buying dedicated routers (or ones where you can assign channels) and things like that
Fingers crossed it’s a blip