Assuming this is ‘stable’. Just did the latest update? Always check the stable update forum page.
From that page.
CUPS update need manual intervention
After you update your system, update your systemd services like this:
sudo systemctl disable --now org.cups.cupsd.socket
sudo systemctl disable --now org.cups.cupsd.service
sudo systemctl disable --now org.cups.cupsd.path
sudo systemctl enable --now cups.service
sudo systemctl enable --now cups.socket
sudo systemctl enable --now cups.path