I’d start by doing the backup normally, not within the update. Trying to do both at once only makes troubleshooting harder. Backups are something you want to be sure of before proceeding.
I think HA only checks for updates once a day, so it’s possible that it hasn’t picked up 2022.5.4 yet.
Keep an eye on the logs, both for the backup and the update. At least this way you’ll have a better idea where the failure is happening. And have something you can post here if it happens again.
no change, even after closing all browser windows and reopen them.
Also the Mobile app is showing the same information and a restart of the Core didn’t change anything.