ssh credential fails

RDBMS 19.20

OEM 13.5 RU16

Creating ssh keys on the OEM server, we can login to a remote server using the keys (no pwd in use). But when trying to add the same pair of keys for the creation of a ssh credential, it fails.

This is when trying to use the credential when deploying a new agent:

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Connection to the SSH daemon (sshd) on the target host failed with the following error : java.security.InvalidKeyException: IOException : Short read of DER length

Ensure that SSH daemon (sshd) on the target host is able to respond to login requests on the provided sshd port 22.