Sounds like what may have happened is that Jesse had to pull it because he couldn't get organiser's liability insurance:
I think that the race's insurer will pay out any claim from Hall's family without it going to court, but has refused to cover this year.
http://www.cyclingweekly.com/news/latest-news/australian-ultra-endurance-race-cancelled-one-year-on-from-death-of-mike-hall-in-2017-event-368436
@frank9755 started
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Sounds like what may have happened is that Jesse had to pull it because he couldn't get organiser's liability insurance:
http://www.cyclingweekly.com/news/latest-news/australian-ultra-endurance-race-cancelled-one-year-on-from-death-of-mike-hall-in-2017-event-368436