Prelude Correlator Crash

Hi everyone !!! I know I'm annoying you so much ... but I need a little help
more !!!
Do you have any kind of idea about the problem that has caused this message
???
Thank you so much ... I hope you'll help me ... Simone

05 May 13:46:06 prelude-correlator (process:5092) INFO: [DshieldPlugin]:
disabled on user request
05 May 13:46:06 prelude-correlator (process:5092) INFO: [FirewallPlugin]:
disabled on user request
05 May 13:46:06 prelude-correlator (process:5092) WARNING:
SpamhausDropPlugin =
PreludeCorrelator.plugins.spamhausdrop:SpamhausDropPlugin: No module named
netaddr
05 May 13:46:06 prelude-correlator (process:5092) INFO:
[BusinessHourPlugin]: disabled on user request
05 May 13:46:06 prelude-correlator (process:5092) INFO: 6 plugin have been
loaded.
05 May 13:46:06 prelude-correlator (process:5092) INFO: Connecting to
127.0.0.1:4690 prelude Manager server.
Traceback (most recent call last):
  File "/usr/bin/prelude-correlator", line 9, in <module>
    load_entry_point('prelude-correlator==1.0.0', 'console_scripts',
'prelude-correlator')()
  File "/usr/lib/python2.7/site-packages/PreludeCorrelator/main.py", line
168, in main
    env.prelude_client = PreludeClient(env, print_input=ifd,
print_output=ofd, dry_run=options.dry_run)
  File "/usr/lib/python2.7/site-packages/PreludeCorrelator/main.py", line
74, in __init__
    self._client.Start()
  File "/usr/lib/python2.7/site-packages/PreludeEasy.py", line 301, in Start
    def Start(self): return _PreludeEasy.Client_Start(self)
PreludeEasy.PreludeError: TLS server certificate is NOT trusted.
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