MDS4 Beta Configuration Certificate Error

Hi
in MDS 4 beta version on Arm mac book
security tab when i click create self signed certificate
go through the process but in end comes up with message as follow:

THERE WAS AN ERROR TRUSTING THE TLS CERTIFICATE: 1

any idea why the error poping up please?

Apple no longer allows you to trust certificate programatically. Please go into keychain, search for the certificate and trust it.

tim

thank you for your help