Is there a way to use it correctly?

Tried with this codes with no success

var circle:Image = new Image("graphics/circle.png");
var mask:Imagemask = new Imagemask(new Image("graphics/circle.png"));

_entity = new Entity(50,30,circle,mask);
add(_entity);

I got this error when building to neko
https://pastebin.com/v5AU4BYk

haxepunk git
lime 6.4.0
openfl 8.3.0