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Hi Alex! I hope I'm not hijacking this thread, but as I am getting a similar error with a standard OpenSSH subsystem, I thought we might as well keep this in one place. Let me know if you disagree.

I'm excited to use the app, but have the same error - auth succeeds, but times out after '0' milliseconds (realtime about 5 mins).

This differs from Bojan's issue in that this is a dedicated CentOS production SFTP server that is accessed by a multitude of people and SFTP/SCP clients. Again, we are using the standard internal (openssh) SFTP server routine, i.e. "Subsystem sftp internal-sftp" in /etc/ssh/sshd_config

Thoughts on why this I'm unable to connect in this case?