couchbase-cli does not work with secure connection and CA verification

Steps to reproduce.

• Install Couchbase server 6.5.0-3810 on a 3 nodes in AWS
• Create a cluster of 3 nodes.
• Tear down 3 nodes to single node
• Generate cert from a node
• Use that cert to connect to list alternate address on that node, failed to connect.

  root@ip-172-31-11-63:~# /opt/couchbase/bin/couchbase-cli ssl-manage -c ec2-54-64.us-west-2.compute.amazonaws.com:8091 -u Administrator -p password --cluster-cert-info > /root/cert.pem

  root@ip-172-31-11-63:~# ls -lh

  total 8.0K

  -rw-r--r-- 1 root root 1.1K Jul 24 07:04 cert.pem

  drwxr-xr-x 3 root root 4.0K Jul 15 23:06 snap

  root@ip-172-31-11-63:~# /opt/couchbase/bin/couchbase-cli setting-alternate-address -c https://ec2-54-64.us-west-2.compute.amazonaws.com:18091 --username Administrator --password password --cacert /root/cert.pem --list

  ERROR: Unable to connect with the given CA certificate

  root@ip-172-31-11-63:~# /opt/couchbase/bin/couchbase-cli setting-alternate-address -c https://ec2-54-64.us-west-2.compute.amazonaws.com:18091 --username Administrator --password password --cacert /root/cert.pem --list -d

  GET https://ec2-54-64.us-west-2.compute.amazonaws.com:18091/pools

  GET https://ec2-54-64.us-west-2.compute.amazonaws.com:18091/pools/default/nodeServices

  ERROR: Unable to connect with the given CA certificate

  root@ip-172-31-11-63:~# cat /etc/issue

  Ubuntu 18.04.2 LTS \n \l

  root@ip-172-31-11-63:~# more /opt/couchbase/VERSION.txt

  6.5.0-3810

  root@ip-172-31-11-63:~#

  I try with internal IP, it does not work either.