Failed to establish a new connection: [Errno 111] Connection refused'

[prrabirmondal]

I have simply cloned the repo and run the file "extract_graph.ipynb" by setting "regenerate = True".
I have not made any changes in the code and finally, I am getting the following issue from the "generate" function of the "client.py "file.

An error occurred: HTTPConnectionPool(host='localhost', port=11434): Max retries exceeded with url: /api/generate (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fe917975790>: Failed to establish a new connection: [Errno 111] Connection refused'))

Kindly let me know how to solve it.
Thanks in advance.