It's probably a temporary network or server outage.
I do not think we can help you with that.
From WinSCP side, all you can do about it, is to retry the connection.

Hello,
I'm getting timeout error on connection to server. The error occurs a few seconds after attempting the connection despite putting a 60 second timeout in my SessionOptions.Timeout parameter.
The weird thing is I'm having the error randomly.. sometimes it works and sometimes not.. I can't find the reason why.

I put the log in attachment.

Thank you for your help.