Current workaround / fix: 1) open Directory Utility app (via Spotlight or other) 2) Click lock to make changes, log in with admin account 2) Click Edit -> Enab

Current workaround / fix: 1) open Directory Utility app (via Spotlight or other) 2) Click lock to make changes, log in with admin account 2) Click Edit -> Enable Root User 3) Click Edit -> Change Root Password… 4) Set a password 5) Do NOT disable root user! If you disable the root user, the admin prompt will create it again with an empty password.