In my Vue 3 project (3.5.13), I'm encountering an error that I don't understand.

const day = ref<DayPresenter>(new DayPresenter());
const dayComputed = computed<DayPresenter>(() => day.value);

I have an error “No overload matches this call.” on the computed. I also get a similar error when I pass it to a child component as props.

const props = defineProps({
  day: {
    type: Object as PropType<DayPresenter>,
    required: true,
  },
});

Why is there this error and what can I do to correct it?

I know I can cast by doing as DayPresenter but I'd like to avoid that.