[초보]redhat8 에서의 Exception type SSL.Error

Exception type SSL.Error

Exception Handler Information
Traceback (most recent call last):
File "/usr/bin/../share/rhn/rhn_applet/rhn_applet.py", line 424, in refresh
self.model.refresh(force)
File "/usr/bin/../share/rhn/rhn_applet/rhn_applet_model.py", line 264, in refresh
self.__rpc_server__.refresh(force)
File "/usr/bin/../share/rhn/rhn_applet/rhn_applet_rpc.py", line 84, in refresh
status = server.applet.poll_status()
File "/usr/src/build/143041-i386/install/usr/lib/python2.2/xmlrpclib.py", line 821, in __call__
return self.__send(self.__name, args)
File "/usr/lib/python2.2/site-packages/rhn/rpclib.py", line 126, in _request
verbose=self._verbose
File "/usr/lib/python2.2/site-packages/rhn/transports.py", line 118, in request
headers, fd = req.send_http(host, handler)
File "/usr/lib/python2.2/site-packages/rhn/transports.py", line 602, in send_http
headers=self.headers)
File "/usr/src/build/143041-i386/install/usr/lib/python2.2/httplib.py", line 537, in request
self._send_request(method, url, body, headers)
File "/usr/src/build/143041-i386/install/usr/lib/python2.2/httplib.py", line 553, in _send_request
self.putrequest(method, url)
File "/usr/src/build/143041-i386/install/usr/lib/python2.2/httplib.py", line 453, in putrequest
self.send(str)
File "/usr/src/build/143041-i386/install/usr/lib/python2.2/httplib.py", line 407, in send
self.sock.sendall(str)
File "/usr/lib/python2.2/site-packages/rhn/SSL.py", line 185, in write
sent = self._connection.send(data)
Error: [('SSL routines', 'SSL3_GET_SERVER_CERTIFICATE', 'certificate verify failed')]

위와 같이 에러가 발생합니다.
파이썬 에러 인거 같은데, 어떤 에러인지요?
어떻게 해결해야 하는지요?