I wonder if there are any legal grounds for compensation for those who travelled long distances (flight costs etc) given the lateness of the cancellation and the reason given of "show not ready".
The problem of any such claim would be that they would have to prove that they travelled...
Tragic loss
£22,000 per ticket! (on some sites)
https://www.independent.co.uk/arts-entertainment/music/news/adele-las-vegas-residency-fans-tickets-b1997681.html