Simulator Settings - WebKit encountered an internal error

Previously when developing my Apps, settings editor in the Simulator worked fine:

File -> Edit Persistant Storage -> Edit Application.Properties Data

But now I get the error:

"WebKit encountered an internal error"

This happens using Simulator 4.2.4 - I rolled back to a previous SDK where it worked and I still get the same error. So may not be SDK related, and possibly something changed on my System. Ubuntu Budgie 22.04.2 LT

I am using Visual Studio Code:

Version: 1.77.3
Commit: 704ed70d4fd1c6bd6342c436f1ede30d1cff4710
Date: 2023-04-12T09:16:52.732Z
Electron: 19.1.11
Chromium: 102.0.5005.196
Node.js: 16.14.2
V8: 10.2.154.26-electron.0
OS: Linux x64 5.15.0-69-generic snap
Sandboxed: Yes

Any clues or logs I can look at?

Thanks