Error using private key SFTP


I’m trying to use the UiPath.FTP package (version 1.0.7346.28183) to connect to a SFTP server using a key filename.ppk. When I run workflow I get an error:Captura de pantalla de 2020-05-11 11-18-53

I use the following properties:

The key is correct because I can log into the SFTP server using Filezilla or WinSCP.
How i can do for solve this problem?

Best regards.