I just upgraded to 10.3.3 and the installer for PAServer that is distributed with the offline installer depends on an expired apple certificate.
3rd Party Mac Developer Installer: Embarcadero Technologies, Inc. (Q4X27M46Z4)
Issued by: Apple Worldwide Developer Relations Certification Authority
Expired: Saturday, 16 November 2019 at 05:06:48 Central European Standard Time
I clicked that away and continued with the installer, but it isn't a warning we should see on trying to install PAServer...
edit: I now noticed from another post in the forum that this is a known issue: