problem in the execution

[Caravaggio195]

2018-02-18 19:15:44 3077 annotator.elasticsearch [INFO] Creating index 'annotator'.
2018-02-18 19:15:44 3077 elasticsearch [WARNING] PUT /annotator [status:404 request:0.002s]
Traceback (most recent call last):
File "run.py", line 114, in
main(sys.argv)
File "run.py", line 67, in main
annotation.Annotation.create_all()
File "/home/domenico/Musica/annotator-store-master/annotator/elasticsearch.py", line 92, in create_all
conn.indices.create(cls.es.index, ignore=400)
File "/home/domenico/Musica/annotator-store-master/test/lib/python3.4/site-packages/elasticsearch/client/utils.py", line 69, in _wrapped
return func(*args, params=params, **kwargs)
File "/home/domenico/Musica/annotator-store-master/test/lib/python3.4/site-packages/elasticsearch/client/indices.py", line 103, in create
params=params, body=body)
File "/home/domenico/Musica/annotator-store-master/test/lib/python3.4/site-packages/elasticsearch/transport.py", line 307, in perform_request
status, headers, data = connection.perform_request(method, url, params, body, ignore=ignore, timeout=timeout)
File "/home/domenico/Musica/annotator-store-master/test/lib/python3.4/site-packages/elasticsearch/connection/http_urllib3.py", line 93, in perform_request
self._raise_error(response.status, raw_data)
File "/home/domenico/Musica/annotator-store-master/test/lib/python3.4/site-packages/elasticsearch/connection/base.py", line 105, in _raise_error
raise HTTP_EXCEPTIONS.get(status_code, TransportError)(status_code, error_message, additional_info)
elasticsearch.exceptions.NotFoundError: TransportError(404, ' \n <title>404 Not Found</title>\n

Not Found

\n

The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.

\n')

I'm not a flask expert, you can help me