when using client certificate downloaded as part of client config zip file from hashicorp cloud console and passing the same to consul give error

host="consul-cluster.consul.AAAAAAAA.aws.hashicorp.cloud"
token="XXXXXX"
scheme="https"
port="443"
verify=True
cert="/home/r2_user1/Downloads/consul/ca.pem"

print("consul host is ", host, token, port, scheme)
cc:consul.Consul=consul.Consul(host=host,token=token,port=port,scheme=scheme,cert=cert)
cc.kv.put('foo', 'bar')

Below is SSL error encounted , without the certs parameter the calls work properly

consul host is consul-cluster.consul.AAAAA.aws.hashicorp.cloud 69d69bed-f849-947d-f75c-a1edc16468e1 443 https
taking a lock <consul.std.Consul object at 0x7f8de4782950>
Traceback (most recent call last):
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/urllib3/connectionpool.py", line 706, in urlopen
chunked=chunked,
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/urllib3/connectionpool.py", line 382, in _make_request
self._validate_conn(conn)
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/urllib3/connectionpool.py", line 1010, in validate_conn
conn.connect()
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/urllib3/connection.py", line 421, in connect
tls_in_tls=tls_in_tls,
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/urllib3/util/ssl.py", line 397, in ssl_wrap_socket
context.load_cert_chain(certfile, keyfile)
ssl.SSLError: [SSL] PEM lib (_ssl.c:3932)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/urllib3/connectionpool.py", line 756, in urlopen
method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/urllib3/util/retry.py", line 574, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='consul-cluster.consul.AAAAAAAA.aws.hashicorp.cloud', port=443): Max retries exceeded with url: /v1/kv/foo?token=XXXXXXXXXX (Caused by SSLError(SSLError(9, '[SSL] PEM lib (_ssl.c:3932)')))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "../consul_lib/test_consul.py", line 27, in
cc.kv.put('foo', 'bar')
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/consul/base.py", line 623, in put
CB.json(), '/v1/kv/%s' % key, params=params, data=value)
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/consul/std.py", line 28, in put
cert=self.cert)))
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/requests/sessions.py", line 602, in put
return self.request('PUT', url, data=data, **kwargs)
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/requests/sessions.py", line 542, in request
resp = self.send(prep, **send_kwargs)
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/requests/sessions.py", line 655, in send
r = adapter.send(request, **kwargs)
File "/home/r2_user1/jv/notification_framework/build/python_workspace/lib/python3.7/site-packages/requests/adapters.py", line 514, in send
raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host='consul-cluster.consul.AAAAAA.aws.hashicorp.cloud', port=443): Max retries exceeded with url: /v1/kv/foo?token=XXXXXXXXX (Caused by SSLError(SSLError(9, '[SSL] PEM lib (_ssl.c:3932)')))