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"bind: Invalid command `enable-meta-key'." when closing a kivy application

#1

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.label import Label

class PlaceApp(App):

def  build(self):
	myWidget = Widget()
	label = Label(
		text = "Hello World!"
		)
	myWidget.add_widget(label)

	return myWidget

if name == ‘main’:
PlaceApp().run()

when i run the above code in Sublime Text 3 on Ubuntu 20.4.1 LTS ,it works fine but then when i tap the close button (x) in the opened application window, it does not close but the console writes out
"
bind: Invalid command `enable-meta-key’.

"
here is a screenshot

Bind%20error%20in%20kivy%20app
Bind error in kivy app.png1366×768 188 KB

I have been using Sublime Text for like 2 years now on Windows now am using Ubuntu because of personal reasons ;-).
So I am certain i ran this exact code on my windows machine and got no such error.

Ps:
I am new and this is my first topic, all guides shall be appreciated Thank you!!!

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