```elixir
Compiling 11 files (.ex)
    warning: unknown key .message in expression:

        err.message

    where "err" was given the type:

        # type: %{..., __exception__: true, __struct__: atom()}
        # from: lib/mix/tasks/configure_phoenix.ex:21
        rescue err ->

    hint: when you rescue without specifying exception names, the variable is assigned a type of a struct but all of its fields are unknown. If you are trying to access an exception's :message key, either specify the exception names or use `Exception.message/1`.

    typing violation found at:
    │
 21 │       err -> log_error(err.message)
    │                            ~~~~~~~
    │
    └─ lib/mix/tasks/configure_phoenix.ex:21:28: Mix.Tasks.LiveSvelte.ConfigurePhoenix.run/1
```