How to set-up password-less `updatedb` on Linux Mint (21.3)?

After setting a password-less updatedb, I am presented with an error:

$ updatedb
/var/lib/plocate/: Permission denied

How can I fix it? *** That is just an example error I got latest. I got more of those. But since it is a very long time since I tried to set this up and failed, now I am confident to make it.