Fail2ban Jails are inactive

Unable to switch on the selected jails: f2bmng failed: Traceback (most recent call last):
File "/usr/bin/fail2ban-client", line 470, in
if client.start(sys.argv):
File "/usr/bin/fail2ban-client", line 440, in start
return self.__processCommand(args)
File "/usr/bin/fail2ban-client", line 256, in __processCommand
if self.__ping():
File...