Help me to open the main window

[KevinNT]

I've run the code but I can't see it. I just saw a small icon on the taskbar but I can't open it... Please help me. Anyone help is appreciated! 

[jsulm]

@KevinNT You have an error in the OUTPUT tab. Please copy it (as text please) and post here...

[JonB]

@KevinNT
Further to @jsulm (please copy & paste text, not show screen shots).

The stack trace in the Output window does not correspond to the code you show in the edit window. Seems to me that whatever you are running as the script file for your Python is different or some other file than the one shown in the editor.