ssh-keygen fails

I'm trying to generate a key in WinSCP using:
First it shows:

Host is not communicating for more than 15 seconds, still waiting...

Then after 1 minutes it switches to an error mode:

Timeout waiting for server to respond.

The ssh-keygen, when executed this way prompts for key information. WinSCP Console windows does not support interactive commands:
https://winscp.net/eng/docs/remote_command