How can I debug issues using an erlang lib?

I am trying out rabbit streams but am having some issues using the Lake library.

I am getting a malformed error from inside the library:

[error] GenServer #PID<0.656.0> terminating
** (CaseClauseError) no case clause matching: {:error, {:malformed, <<65, 77, 81, 80, 0, 0, 9, 1>>}}
    (lake 0.1.2) /Users/me/projects/my-app/deps/lake/src/lake_raw_connection.erl:36: :lake_raw_connection.peer_properties/1
    (lake 0.1.2) /Users/me/projects/my-app/deps/lake/src/lake_raw_connection.erl:24: :lake_raw_connection.connect1/6
    (lake 0.1.2) /Users/me/projects/my-app/deps/lake/src/lake_raw_connection.erl:9: :lake_raw_connection.connect/6
    (lake 0.1.2) /Users/me/projects/my-app/deps/lake/src/lake_connection.erl:35: :lake_connection.connect/6
...

How do I decode this value to debug the issue? The value doesn’t look particularly long, is this even a useful error message? Is there another way I can troubleshoot this issue?

Calling code for background:

    result = :lake.connect(
      'localhost',
      5672,
      'guest',
      'guest',
      '/'
    )

I thought it might be an issue passing binaries/strings instead of char lists, but have tried <<"localhost">>, 'localhost', String.to_charlist("localhost"), etc but the called function arguments match so I don’t think it is that.