Which new version? If you mean today’s 2.1.0.3, it says that.
What’s “as well” about? If something went away, what was it?
Going from 2.0.8.1 to 2.1.0.2 to 2.1.0.3 should keep all config.
Presumably Application event log. Do you know what you did?
Developer would be the one to read stack trace, if it’s needed.
Meanwhile, sometimes a new tab or a refresh will clear things.
Are you doing what I said, opening browser from a Tray Icon?
What are you using in original topic here? Tray Icon or Windows Service?
For your other device, follow the below section in page I linked previously:
Example change with a different context
For a typical install (custom can vary), use Command Prompt (Admin) or similar to run
Duplicati.CommandLine.ServerUtil change-password --server-datafolder "C:\Windows\System32\config\systemprofile\AppData\Local\Duplicati"