Putting this here as reference, maybe it'll get fixed, but there is a workaround. but took me ages to work this out.
When you have the following and the group and timescale properties are undefined, the scheduler causes a js error and breaks react. It should be using the defaults as per the scheduler api doco.
use case is that I want to pass these in from other components (or not). I've had to set them to the defaults if they are undefined from the parent component.
const myGenericScheduler = ({group, timeScale}) => {
return <ScheduleComponent group={group} timeScale={timeScale} />
}