I keep getting the "Server settings are unavailable." error

[CWallace]

@nibbles seems to have a solution:

Server settings are unavailable after last update. MacOS

Known working version: 1.28.2.6151 (download) Known working version: 1.29.0.6244 (download) You need to do a downgrade to one of the above versions. I’ve tested both on my 2018 Mini x64 with 10.14.6 like you. Normally downgrading is as easy as stopping PMS and dropping a new one into /Applications. But by changing your plist you now have to sign out and reclaim. How To Sign Out PMS on a MAC, Downgrade, and Reclaim Sign out PMS from Remote and Local logins Quit out of PMS on the Mini if it…

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Good luck!

Chris