Established, waiting for incoming data... , somehow we missed this thread, my apologies. In the latest version the issue can only be reproduced under specific circumstances - see below.
, there's a known issue when the connection doesn't go through the UP and LOCKED Windows user session, with this very error message. If somebody presses Ctrl+Alt+Del, the connection will be established just fine, but obviously that's a weak workaround.
The connection goes fine while no session is up, and while the user session is up and NOT locked.
The bug is supposed to be fixed in the next release, sorry for the inconvenience.