I then get:
Found 1 tokens in /tmp/harddisk/My_Music
Token 1: /tmp/harddisk/My_Music
Expanding precomments to 2048
Expanding precomments to 4096
Checking existence of /opt/share/mt-daapd/admin-root
Checking existence of /opt/share/mt-daapd/admin-root
Config entry general/db_dir is deprecated. Please review the sample config
Checking existence of /opt/var/mt-daapd
Checking existence of /opt/var/mt-daapd
Loading new config file.
Converting config file…
Error writing config file.
My understanding is that admin is the root account on the asus. There seems to be no user called root.