Uh oh, a random ‘tutorial’, and one that both uses an (old) manjaro ISO version as if it is some sort of desktop version as well as the tut being years old.
I doubt it, as written … (capitalization matters)
But also … -Sy should be avoided for creating partial upgrades.
This is wrong.
For one thing … starting the service will only start it now … it will be gone again on next boot.
Furthermore the service name is incorrect.
(in fairness this is likely due to its age) cups provides the service cups
ex:
systemctl enable cups --now
Though … I might opt for enabling the socket instead.
That service was renamed a few years back, one of the pitfalls of outdated tutorials.
The CUPS service now is simply named cups.service so that instruction would now be:
$ systemctl start cups.service
It is socket enabled however and would not need manual start, just socket enabling:
$ systemctl enable --now cups.socket
For further information take a look at the already mention Arch Wiki CUPS page.