Server url on umbrel

There is nothing to say regarding the original post except for that we do not support these third-party tools.

We can help with reverse proxies and setup and config of docker in most cases. But these kind of setups are not general.

We are giving you what is needed for Vaultwarden to work.

  1. Access to the server from the client.
  2. HTTPS (either via reverse proxy or native)

If one of those items is not working there is no access.
So, if you can’t reach your domain, which in your case is a .onion address, you need to fix that.

If you can’t login because you do not have HTTPS, you need to fix that.

If those conditions are met it should work.
More then these pointers we can’t provide since we do not know or support the platform you use.