Python etcd3 client library is not able to read ca cert

Bug report criteria

[ ] This bug report is not security related, security issues should be disclosed privately via etcd maintainers.
[ ] This is not a support request or question, support requests or questions should be raised in the etcd discussion forums.
[ ] You have read the etcd bug reporting guidelines.
[ ] Existing open issues along with etcd frequently asked questions have been checked and this is not a duplicate.

What happened?

I am trying to take a snapshot of etcd via etcd3 python client library and my code looks like this :

 import etcd3
  etcd = etcd3.client(
                  host='xx.xx.xx.xx',
                  port='2379',
                  cert_cert='/etc/kubernetes/pki/etcd/server.crt',
                  cert_key='/etc/kubernetes/pki/etcd/server.key',
                  ca_cert='/etc/kubernetes/pki/etcd/ca.crt'
                )
            print("Client connected:", etcd)
            etcd.snapshot('etcd_backup.db')
            print("Snapshot taken successfully.")
    except Exception as e:
             print("Error:", e)

I am getting this error

And if I remove the ca_cert path then I get ETCD connection failed.

What did you expect to happen?

I expect etcd3 client to recognize ca cert and get connected to etcd

How can we reproduce it (as minimally and precisely as possible)?

Install pip install etcd3 python etcd client library

Anything else we need to know?

No response

Etcd version (please run commands below)

Etcd configuration (command line flags or environment variables)

# paste your configuration here

Etcd debug information (please run commands below, feel free to obfuscate the IP address or FQDN in the output)

```console $ etcdctl member list -w table # paste output here $ etcdctl --endpoints= endpoint status -w table # paste output here ```

Relevant log output

No response

etcd-io / etcd