Hi wori,

re:
> Elephant has been released on Mar.2, 2021 (refer to https://github.com/nkallen/elephant/releases/tag/v0.1-alpha).

That's an experimental version branched off from an older version, don't use that one.

Use Nodeeditor 1.1 jms from:
https://moi3d.com/forum/index.php?webtag=MOI&msg=9358.10

- Michael