Could not load Passwords Preference pane in MacOS

Please read the following user tip and restate your question/problem in detail: 

     Writing an Effective Apple Support Communities Question - Apple Community

What happens when you try?

What fixes have you tried?

The user is referencing as per below image ?

Can user ( you ) open the " Security & Private " Applet or the " Startup Disk " Applet ?

1 - Restart in Safe Mode. This will perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts. The boot up will be slow and can take some time - Normal.

2 - Does the issue present in this mode ?

3 - Sometimes a Safe Boot followed by a Normal Boot will just put things right.

EDITED

Suggestion since there are at least Two Contributors appearing here, that you choose the Respond to the User you intents to address.

Right now you are responding Only to Yourself and that will become a real headache to know to Whom you intended to address

👍. 😎