Flow error in chapter 04. Flow error: (This type is incompatible with the expected param type of Element)

Type of issue: Bug

Chapter: 04

If it's a bug: Yes

Flow error: (This type is incompatible with the expected param type of Element) ReactDOM.render(, document.querySelector(APP_CONTAINER_SELECTOR));

But if I add the following code. const rootEl = document.querySelector(APP_CONTAINER_SELECTOR); if (!(rootEl instanceof Element)) { throw new Error('invalid type'); } ReactDOM.render(, rootEl);

the Flow errors are gone.