The issue occurs because the required Japanese font is not installed and configured on the operating system of the server where Deep Security Manager is currently installed.
Install the following font package and font configuration package on the OS and restart the Deep Security Manager service.
- Red Hat Enterprise Linux 6.x and 7.x
yum install vlgothic-fonts yum install fontconfig fc-cache -fv service dsm_s restart
- Red Hat Enterprise Linux 5.x
yum install fonts-japanese service dsm_s restart