"Passcode not set" when trying to update to Ventura 13.1
I have a MacBook Pro 13" M1 2020. I've been advised that I have an upgrade to 13.1. I clicked on the upgrade but was told that the Passcode is not set.
This is the first time that I have come across this issue as all previous upgrades were performed without any problem. I am not the most computer savvy individual, so please can someone advise me what to do.
Many thanks in advance.