^^Yes, I used the node editor version from James with the recent version of MoI V4. I can retry with the V5 beta when at home again.

Edit: I just installed the Moi3D V5 beta (this time on a M2 Mac instead of a Windows machine) and am getting exactly the same error message when clicking on "Macro".
I placed the uncompressed node editor under "Moi v5 beta Apr-13-2023.app/Resources/ui" and added this start script to the shortcuts: moi.ui.createDialog( 'nodeeditor/index.html', 'resizeable,defaultWidth:680,defaultHeight:420', moi.ui.mainWindow )