title: .kv file doesn't load in python
body: <pre><code>    #:kivy 1.11.1 
  
      &lt;myManager&gt;:
          connPage:
          myGame:
  
      &lt;connPage&gt;:
          name: "main"
  
          GridLayout:
              cols: 1
  
              GridLayout:
                  cols: 2
  
                  Label:
                      text: "Password: "
  
                  TextInput:
                      id: password
                      multiline: False
  
              Button:
                  text: "Submit"
                  on_release:
                      app.root.current = "mygame"
  
      &lt;myGame&gt;:
          name: "mygame"
  
          Button:
              text: "Go back"
              on_release:
                  app.root.current = "main"
  
      -----------------------------------------------------------------------------------------------------
      import kivy
      from kivy.app import App
      from kivy.uix.gridlayout import GridLayout
      from kivy.uix.label import Label
      from kivy.uix.textinput import TextInput 
      from kivy.uix.widget import Widget 
      from kivy.uix.button import Button
      from kivy.uix.screenmanager import ScreenManager, Screen
      from kivy.clock import Clock
      from kivy.core.window import Window
      from kivy.uix.scrollview import ScrollView
      from kivy.lang import Builder
      import os
      import sys
  
      kivy.require("1.11.1")
  
      class connPage(Screen):
          pass
  
      class myGame(Screen):
          pass
  
      class myManager(ScreenManager):
          pass
  
      kv = Builder.load_file("stylesheet.kv")
  
      class MyApp(App):
          def build(self):
              return kv
  
      if __name__ == "__main__":
          MyApp().run()
  
  
      ____________________________________________________________________________________________________
  </code></pre>
  
  <p>How do fix this bug because I don't seem to find my error in my code
  It could be an indentation error or a typo but I don't get any feedback in the terminal either
  This is an attempt at a mobile gaming app in python with the kivy module
  And all I get in the kivy window is a blavk screen, so it could be that the file is just never loaded.
  Thanks in advance</p>