Not able to create concave object as it is achieved in the demo

I am trying to make concave object but alas I recieve:

matter.min.js:55 Uncaught TypeError: c.makeCCW is not a function
    at Object.o.fromVertices (matter.min.js:55)
    at main.js:558
    at Object.o.stack (matter.min.js:57)

My implementation is as follows:

 var chevron = Matter.Vertices.fromPath('100 0 75 50 100 100 25 100 0 50 25 0');
            var stack = Matter.Composites.stack(50, 50, 6, 4, 10, 10, function(x, y) {
                var color = '#556270';
                return Bodies.fromVertices(x, y, chevron, {
                    render: {
                        fillStyle: color,
                        strokeStyle: color,
                        lineWidth: 1
                    }
                }, true);
            });

var add = function(body) {
    World.add(engine.world, [body]);
}
add(stack);

I thank you for your help it is very nice engine! but I digress…

Best,

[liabru]

That is a list of vertices in the form x y x y x y ..., the origin will be calculated as the centre of mass of that shape.

[Eman2022]

“Matter.Vertices.fromPath(‘100 0 75 50 100 100 25 100 0 50 25 0’);”

DOES anyone understand how this works? The first 100 0 is supposed to be the origin? Say if I wanted to just make a triangle, how do I plot it out? The last two 25 0 must be something important too?