Unable to choose airport

Hello,
I use P3D V4.1, FsiPanel 1.0.0.35. I used FsiPanel and everythink worked fine. But when I started today, I couldn't choose any airport. After each letter I get an error message:
FSIPanel encounter an unhandled exception, please check log.txt for detail.

log.txt is:
07.03 22:23:30   FSiPanel started, Order Number : 1302
07.03 22:23:31   Database access OK
07.03 22:23:49   SimConnect Exception : 9
07.03 22:23:49   SimConnect Exception : 7
07.03 22:23:53   Exception : System.NullReferenceException: Object reference not set to an instance of an object.
   at FSiPanel2017_P3D.FrmMain.(String , String , Boolean )
   at (Object , String , String , Boolean )
   at a..(Object , String , String , Boolean )
   at FSiPanel2017_P3D.FrmMain.ProcessClientOrder(String Order)
   at (Object , String )
   at a..(Object , String )
   at FSiPanel2017_P3D.FrmMain.(Object , EventArgs )
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
07.03 22:24:00   Exception : System.NullReferenceException: Object reference not set to an instance of an object.
   at FSiPanel2017_P3D.FrmMain.(String , String , Boolean )
   at (Object , String , String , Boolean )
   at a..(Object , String , String , Boolean )
   at FSiPanel2017_P3D.FrmMain.ProcessClientOrder(String Order)
   at (Object , String )
   at a..(Object , String )
   at FSiPanel2017_P3D.FrmMain.(Object , EventArgs )
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
07.03 22:24:02   Exception : System.NullReferenceException: Object reference not set to an instance of an object.
   at FSiPanel2017_P3D.FrmMain.(String , String , Boolean )
   at (Object , String , String , Boolean )
   at a..(Object , String , String , Boolean )
   at FSiPanel2017_P3D.FrmMain.ProcessClientOrder(String Order)
   at (Object , String )
   at a..(Object , String )
   at FSiPanel2017_P3D.FrmMain.(Object , EventArgs )
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
07.03 22:24:05   Exception : System.NullReferenceException: Object reference not set to an instance of an object.
   at FSiPanel2017_P3D.FrmMain.(String , String , Boolean )
   at (Object , String , String , Boolean )
   at a..(Object , String , String , Boolean )
   at FSiPanel2017_P3D.FrmMain.ProcessClientOrder(String Order)
   at (Object , String )
   at a..(Object , String )
   at FSiPanel2017_P3D.FrmMain.(Object , EventArgs )
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
Thank you for your help
Thomas

Hello J-P,