UI stucks at keep loading, the log says connection refused

[shamim27khan]

I had Augur installed
augur: dev install
db: local on the same server(used ip address instead of localhost, since there was problem)
frontend: nginx as per documentation

Error:

[3268] augur.server [ERROR] Exception on /api/unstable/task [POST]
Traceback (most recent call last):
File "/home/shamim/augur/lib/python3.8/site-packages/urllib3/connection.py", line 159, in _new_conn
conn = connection.create_connection(
File "/home/shamim/augur/lib/python3.8/site-packages/urllib3/util/connection.py", line 84, in create_connection
raise err
File "/home/shamim/augur/lib/python3.8/site-packages/urllib3/util/connection.py", line 74, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/shamim/augur/lib/python3.8/site-packages/urllib3/connectionpool.py", line 670, in urlopen
httplib_response = self._make_request(
File "/home/shamim/augur/lib/python3.8/site-packages/urllib3/connectionpool.py", line 392, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.8/http/client.py", line 1252, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1298, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1247, in endheaders