Unable to connect to ARM instance using serial console or VNC!

Content

ssh -o ProxyCommand='ssh -W %h:%p -p 443 ocid1.instanceconsoleconnection.oc1.phx.abyhqljrot2jzywvn2vs6ikkzraesq46ud3hjo3pogrhqba44eqx7rftyvkq@instance-console.us-phoenix-1.oraclecloud.com....

ssh -i <privae ssh key> -o ProxyCommand='ssh -i <privae ssh key> -W %h:%p -p 443 ocid1.instanceconsoleconnection.oc1.phx.abyhqljrot2jzywvn2vs6ikkzraesq46ud3hjo3pogrhqba44eqx7rftyvkq@instance-console.us-phoenix-1.oraclecloud.com....

Permission denied (publickey).

kex_exchange_identification: Connection closed by remote host Connection closed by UNKNOWN port 65535

Although from the same local Linux machine I am able to connect to the instance using SSH.

There seems to be a problem that the password permissions are too open, chmod 400 ~/.ssh/id_rsa  ... Still the same error!