Cannot connect with YouTrack

[Astorcamon]

Hello, I'm trying to connect with YouTrack but i don't know what I'm doing wrong.

Any help?, thanks

System.Net.WebException: Request aborted: Cannot create SSL / TLS secure channel. en System.Net.HttpWebRequest.GetResponse() en YurtleTrack.Service.HttpWebRequestProxy.GetResponse() en YurtleTrack.Service.YouTrackBugService.GetAuthCookie() en YurtleTrack.Service.YouTrackBugService.get_AuthCookie() en YurtleTrack.Service.YouTrackBugService.GETResponseFrom(String url) en YurtleTrack.Service.YouTrackBugService.GetProjects() en YurtleTrack.Presenter.BugListViewPresenter.Initialize() en YurtleTrack.View.FormBugListView.OnLoad(EventArgs e) en System.Windows.Forms.Form.OnCreateControl() en System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) en System.Windows.Forms.Control.CreateControl() en System.Windows.Forms.Control.WmShowWindow(Message& m) en System.Windows.Forms.Control.WndProc(Message& m) en System.Windows.Forms.Form.WmShowWindow(Message& m) en System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)