As my bug reports explains: The Video-Guide and Script from SpaceinvaderOne for ZFS Snapshot Backups cannot safely backup live databases, it'll corrupt them. Please make sure, that you either stop all dockers using a database before running the script or you copy the live database into a db-dump beforehand, as long as you use this script.
May I suggest you have a look at cosmos cloud? It's comparable to casaOS from a usability standpoint but it is more secure and has much more features like integrated Auth-Proxy.