Fail2Ban not running in Dashboard/System Status

New FreePbx Distro installation:
FreePbx 12
Asterisk 13
CentOs 6.6

Reports->System Status

In the System Overview panel, Fail2Ban is marked as “Unable to detect server status”, but I can independently verify that it is running quite happily.

Need a suggestion as to what to check/fix to make FreePbx happy.