Problem:

Uploading contacts via SFTP generates the following error code:

ERROR:> Auth failed. Passw Not Sent Yet. Meth that could otherwise continue: publickey,password.

Root Cause:

This occurs when someone attempts to create a public key which has rendered the existing private key inoperable.

Solution:

A new private key must be generated and downloaded for SFTP uploads.

To generate a new private key please see knowledge base article EBS: How to Generate a File Encryption Key for Contact and/or Asset SFTP Uploads.