Configured authentication methods failed.

[Soliaonline]

Do you read the FAQ?
Yes

Describe the bug
Configured authentication methods failed.

To Reproduce
sftpConfig.json

{
"protocol": "sftp",
"host": "XX.XX.XX.XX",
"username": "root",
"remotePath": "/var/www/",
"privateKeyFile": "D:/private.pem"
}

Expected behavior
Login

Desktop (please complete the following information):
Win 10

It may be user error, I have read several other tickets and I am not able to get this to work. Why is there no documentation for "privateKeyFile" I can only find it in tickets, and I through trial and error I learned you are required to use a pem and not a ppk.