You should define the states for your component e.g. "loading, error etc." So when you api call is failed or still loading you may use those props to do some conditional rendering .
So, if you are using Redux, just define some flags in your reducers for error and loading states, then check those in your JSX conditionally. You may also define an initial state for your reducer if you don't want null conditions for your objects (You can also use defaultProps but keeping all of them in redux is better IMO.)
Note: You can return "null" from a JSX block if you don't want to render that part.