Just installed OMV 5 with the latest ISO (5.6.13-amd64.iso) from the website and after the installation it is not possible to change the UI password.
While trying to apply the new password the following error appears: The method 'setPassword' does not exist for the RPC service 'WebGui'.
It doesn't matter if all the available updates are being applied or not.
Installing OMV 6 is not an option because HDD spindown doesn't work. Pretty frustrating situation since OMV 4 worked flawlessly but Debian Stretch reached EOL.