Yes, the Privia Administrator tool is version specific so you cannot run the administrator tool 5.4 on a 5.3.1 server. This is because the tool talks directly to the system and manipulates the database. So, it is server version specific.

Privia LLC tests the Platform Client, Process Designer, and Toolbar to be forward and backwards compatible by 2 versions. But the Administrator tool for Privia is very version specific. This is because the Administrator tool talks directly to the system and manipulates the database. So, it is server version specific. The platform client and the administrator tool are independent applications so you can install different versions of the client and admin. But your administrator tool must match your server. If you connect to a server with the wrong version of the tool, you will generally get a blank screen with no folders or items in the window panes.