Authentication issue with private key

[Snehal13]

I am trying to upload a csv file from attachment table to a remote server using private key authentication but I get a authentication failed error as

"Adding target to blacklist, No valid credential found for type [SSH Password. SS Private Key]"

I have MID server user and the key in same domain and MID is up and running. The server endpoint, username and key are all valid. Instance certificates are good too What could be wrong. the error log gives no more details of the issue.

[suvro]

How are you defining the key ?

[suvro]

Have you created a record in the credentials table with the key

Create a record in ssh_private_key_credentials table and test that credential with an IP address to confirm whether it is working