OH4 migrated to new server with Zulu 17.0.13, now seeing /auth ManagedProvider not available errors

Setup, Configuration and Use Migration
1

I had OH4 running on an old, small MacMini in Docker; it started having HW instability, so I tar’d up everything (all /openhab mounts were provided external to container at start) and moved to a beefier platform (Fresh install of Ubuntu 24.04, Zulu 17.0.13).
After having the service start relatively clean, I’m getting HTTP 500 at /auth when trying to (re)set admin user credentials from userdata/jsondb/users.json, namely:

java.lang.IllegalStateException: ManagedProvider is not available

Did I miss something with Java (cipher?) provider or is something else entirely going on?

2

nvm - problem was extra dot files created by transfer from MacOS to Linux; removing all those files allowed clean startup.