Weird macOS user account problem

I'm having a weird issue on a 13" 2016 MacBook Pro with Touchbar (with macOS 15.4 installed), where if i try to add additional user accounts, it doesn't accept my password

In other areas of the settings app, it does accept my password

I am not even sure if this is an OpenCore issue, a macOS issue, or if it has something to do with the MacBook Pro itself (the T1 chip in it seems to be completely bricked, which prevents me from installing a native version of macOS)