I'm unable to authenticate to escalate system preferences on Beta 2. I can sudo at terminal with same account, authenticate to log in with same account, so I'm positive my credentials are correct.
So far, I've performed upgrades from Beta 1, clean install of Beta 2 on APFS volume in same container as Catalina, and complete wipe of hard disk, clean install of Catalina on one APFS container and clean install of Beta 2 on a different APFS container.
Anyone experience this and have an answer?