I don’t know if it is normal behaviour but after an upgrade I wanted to start SeaDrive again and it said “login expired”. Couldn’t this cause problems with pending “updates” of files? They would be lost?
“Login expired” means the current device is removed from the seahub devices page (by either yourself or someone else). You should double check who might have done that.
No that is not the cause. SeaDrive asked a reboot after for the installation and then the error occurred.