TypeError: Object(...) is not a function

[Rolanddoda]

I cloned the project and ran npm install. Next, I ran npm run serve but this is what I got:

It seems that the issue is coming from using readonly in @store/index line 61:

export const NotificationProvider = createComponent({
  setup() {
    provide(key, {
      ...toRefs(readonly(state)), // <= HERE
      ...computeds,
      ...actions,
    })
    return {}
  },
  render(h) {
    return h('div', this.$slots.default)
  },
})