[BUG] Can not connect to cluster with client ssl certificates

[mengzyou]

Describe the bug
Use the same certifiates (ca.pem, client.crt, client.key),the etcdctl can connect to cluster successfully.

❯ etcdctl --cacert="ca.pem" --cert="client.crt" --key="client.key" --endpoints="https://etcd.fccl.local:2379" member list
c23fad347fee0a7, started, etcd-3, https://192.168.122.93:2380, https://192.168.122.93:2379,https://192.168.122.93:4001, false
757e7683f515eea2, started, etcd-2, https://192.168.122.92:2380, https://192.168.122.92:2379,https://192.168.122.92:4001, false
9f1c42ff2f0fc235, started, etcd-1, https://192.168.122.91:2380, https://192.168.122.91:2379,https://192.168.122.91:4001, false

But when configure it in etcd-manager

It reported errors

E0114 11:51:51.752654155    5226 ssl_transport_security.cc:690] Invalid private key.
E0114 11:51:51.752748647    5226 ssl_security_connector.cc:112] Handshaker factory creation failed with TSI_INVALID_ARGUMENT.
E0114 11:51:51.752767642    5226 secure_channel_create.cc:132] Failed to create secure subchannel for secure name '192.168.122.91:2379'
E0114 11:51:51.752777857    5226 secure_channel_create.cc:50] Failed to create channel args during subchannel creation.

To Reproduce
Steps to reproduce the behavior:

1. Go to Etcd Settings
2. Toggle on 'Secure connection', and browser the related certificates files.

Expected behavior
Connect to cluster successfully.

Screenshots
Se above.

Desktop (please complete the following information):

• OS: Linux (openSUSE Leap)
• OS version: 15.4
• ETCD manager version: 1.2 (AppImage)

[orynkanov]

doesn't work for me either

[dgrechka]

for me as well

[hirey-dzhemiliev]

and for me