By default, the Director and Storage daemon do not run with
root permission. If the /var/bacula is owned by root, then it
is possible that the Director and the Storage daemon will not
be able to access this directory, which is used as the Working
Directory. To fix this, the easiest thing to do is:
chown bacula:bacula /var/bacula
Note: as of 1.38.8 /var/bacula is installed root:bacula with
permissions 770.