ModuleNotFoundError: No module named 'dotmap'

[anthelix]

Hello,
thank you very much for your work.
When I do this python3 initialize_elasticsearch.py, I get this error ConnectionError(<urllib3.connection.HTTPConnection object at 0x7f3fc0427410>: Failed to establish a new connection: [Errno 111] Connection refused) caused by: NewConnectionError(<urllib3.connection.HTTPConnection object at 0x7f3fc0427410>: Failed to establish a new connection: [Errno 111] Connection refused)
If I enter http://localhost:9200in my address bar it doesn't work but it does, do you know why?
It's OK for this one http://localhost:5601
Thanks for the help.