Can't seem to call use this.effect() or alternative

Modding Help
1

For some reason when I try to call this.effect(), it causes error:
Uncaught TypeError: this.effect is not a function

Trying to use layers.C.effect() causes error:
Uncaught TypeError: Cannot read properties of undefined (reading 'effect')

And I know this isn’t how effect() is used, but using player.C.effect() causes error:
Uncaught TypeError: Cannot read properties of undefined (reading 'C')

The entire layer is:

addLayer('C', {
    name: "hyper-cash",
    resource: "Hyper Cash",
    startData() {
        return {
            unlocked: true,
            points: new Decimal(0)
        }
    },
    update(diff) {
        if(hasMilestone('HC', 0)) player.C.points = player.C.points.add(new Decimal(0.1).times(diff))
    },
    effect() {
        return player.C.points.times(0.01).add(1)
    },
    effectDescription: "placeholder " + format(this.effect()),
    color: "#34eb67"
})

(I’m using layer proxy to render the layer)

layers.C.effect() works perfectly fine in mod.js when implementing the effect (doesn’t seem to work in other layers)

2

I changed it so that effectDecription is a function and it works now