Update Now fail at "Creating backup..."

Volumio 2.452
RPi 3 B+
HiFiBerry DAC+ Pro

Apologies if this is a duplicate bug report:

Volumio OTA update from 2.452 to 2.502 fails in System Settings:System Updates.

On 1st attempt it gets to about 1% on progress bar then immediately drops back to System Settings view.
On 2nd attempt it gets to “Creating backup”, about 15% on progress bar, then stalls for 5 seconds then drops back to Systems Settings view.

Update does not complete.

Deleted user data in Systems Settings, tried Update Now again - and it still doesn’t work, same fail behavior.

Any help?

Can you please send a bug report?

done: update-now-fails-creating-backup-t11239.html