It happened all the time in the original setup where Midihub is connected to a powered USB hub. I connected it directly to the USB dock of my notebook now (using a different cable) and the process went through until…
BUT: after re-connecting the firmware update seem to work:
This used to happen before with other FW updates. I should add that all my pipes are gone (of course I made a backup and can get them back).
Cheers SF
Edit: It’s getting worse… the backup file isn’t processed:
An older one worked. I think most of my config is rescued.