Could you help me with the following error in the Splunk Add-on for Tenable?: "not connecting to my scanner"

[jchapell]

Could you help me with the error listed below?

2018-10-17 11:27:56,673 ERROR pid=7409 tid=MainThread file=nessus_rest_client.py:request:100 | Failed to connect https://x.x.x.x:8834/scans, reason=Traceback (most recent call last):
  File "/opt/splunk/etc/apps/Splunk_TA_nessus/bin/nessus_rest_client.py", line 80, in request
    headers=headers)
  File "/opt/splunk/etc/apps/Splunk_TA_nessus/bin/splunktalib/httplib2/__init__.py", line 1593, in request
    (response, content) = self._request(conn, authority, uri, request_uri, method, body, headers, redirections, cachekey)
  File "/opt/splunk/etc/apps/Splunk_TA_nessus/bin/splunktalib/httplib2/__init__.py", line 1335, in _request
    (response, content) = self._conn_request(conn, request_uri, method, body, headers)
  File "/opt/splunk/etc/apps/Splunk_TA_nessus/bin/splunktalib/httplib2/__init__.py", line 1257, in _conn_request
    conn.connect()
  File "/opt/splunk/etc/apps/Splunk_TA_nessus/bin/splunktalib/httplib2/__init__.py", line 1018, in connect
    sock.connect((self.host, self.port))
  File "/opt/splunk/lib/python2.7/socket.py", line 228, in meth
    return getattr(self._sock,name)(*args)
timeout: timed out