Ошибка MDNavigation Drawer (AttributeError: модуль 'kivy.core.window' не имеет атрибута 'width')

Question

Я пытаюсь реализовать MDNavigation Drawer в моем главном окне. он работал раньше, но я попытался поместить его под макет навигации из-за того, что он оставил пятно на моей главной странице, но теперь то, что раньше работало, больше не работает, и все, что я пытаюсь, выдает мне эту ошибку. Буду признателен за помощь. Спасибо. Ниже трассировка и мой код. Заранее спасибо.

Код

<MainWindow>


    canvas.before:
        Color:
            rgba: 0, 0, 0, 1
        Rectangle:
            pos: self.pos
            size: self.size

    NavigationLayout:
        MDNavigationDrawer:
            id: thenavigation
            ScrollView:
                MDList
                    NavigationItemTwo:
                        id: identifyitem
                        NavigationImage:
                    NavigationItem:
                        text: "Profile"
                        on_release:
                            app.root.current = "page"
                            root.manager.transition.direction = "up"
                    NavigationItem:
                        text: "Schedule"
                        on_release:
                            app.root.current = "schedule"
                            root.manager.transition.direction = "up"
                    NavigationItem:
                        id: themessage
                        text: "Messages"
                        on_release:
                            app.root.current = "messages"
                            root.manager.transition.direction = "up"
                    NavigationItem
                        id: thenotification
                        text: "Notifications"
                        on_release:
                            app.root.current = "notif"
                            root.manager.transition.direction = "up"

                    NavigationItem
                        text: "Projects Posted"
                        on_release:
                            app.root.current = "projectsposted"
                            root.manager.transition.direction = "up"

                    NavigationItem:
                        text: "Projects done by you"
                        on_release:
                            app.root.current = "byyou"
                            root.manager.transition.direction = "up"

                    NavigationItem
                        text: "Projects done by others"
                        on_release:
                            app.root.current = "byothers"
                            root.manager.transition.direction = "up"

                    NavigationItem
                        text: "Search Freelancers"
                        on_release:
                            app.root.current = "searchfreelancers"
                            root.manager.transition.direction = "up"

                    NavigationItem
                        text: "Log Out"
                        theme_text_color: "Custom"
                        text_color: (1, 0, 0, 1)
                        on_release:
                            root.loggedout()

Выслеживать

 Traceback (most recent call last):
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 249, in create_handler
     return eval(value, idmap), bound_list
   File "<string>", line 7, in <module>
 AttributeError: module 'kivy.core.window' has no attribute 'width'
 
 During handling of the above exception, another exception occurred:
 
 Traceback (most recent call last):
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 615, in _apply_rule
     rctx['ids'])
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 254, in create_handler
     cause=tb)
 kivy.lang.builder.BuilderException: Parser: File "<inline>", line 7:
 ...
       5:<MDNavigationDrawer>:
       6:    size_hint_x: None
 >>    7:    width: Window.width - dp(56) if Window.width <= dp(376) else dp(320)
       8:    x:
       9:        (self.width * (self.open_progress - 1))         if self.anchor == "left"         else (Window.width - self.width * self.open_progress)
 ...
 AttributeError: module 'kivy.core.window' has no attribute 'width'
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 249, in create_handler
     return eval(value, idmap), bound_list
   File "<string>", line 7, in <module>
 
 
 During handling of the above exception, another exception occurred:
 
 Traceback (most recent call last):
   File "/Users/temitayoadefemi/PycharmProjects/Merri Inc/mainfile.py", line 6224, in <module>
     MyApp().run()
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/app.py", line 800, in run
     root = self.build()
   File "/Users/temitayoadefemi/PycharmProjects/Merri Inc/mainfile.py", line 6218, in build
     sm = Builder.load_file("kivy.kv")
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 301, in load_file
     return self.load_string(data, **kwargs)
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 400, in load_string
     self._apply_rule(widget, parser.root, parser.root)
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 584, in _apply_rule
     self.apply(child)
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 469, in apply
     self._apply_rule(widget, rule, rule, ignored_consts=ignored_consts)
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 585, in _apply_rule
     self._apply_rule(child, crule, rootrule)
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 584, in _apply_rule
     self.apply(child)
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 469, in apply
     self._apply_rule(widget, rule, rule, ignored_consts=ignored_consts)
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 630, in _apply_rule
     e), cause=tb)
 kivy.lang.builder.BuilderException: Parser: File "<inline>", line 7:
 ...
       5:<MDNavigationDrawer>:
       6:    size_hint_x: None
 >>    7:    width: Window.width - dp(56) if Window.width <= dp(376) else dp(320)
       8:    x:
       9:        (self.width * (self.open_progress - 1))         if self.anchor == "left"         else (Window.width - self.width * self.open_progress)
 ...
 BuilderException: Parser: File "<inline>", line 7:
 ...
       5:<MDNavigationDrawer>:
       6:    size_hint_x: None
 >>    7:    width: Window.width - dp(56) if Window.width <= dp(376) else dp(320)
       8:    x:
       9:        (self.width * (self.open_progress - 1))         if self.anchor == "left"         else (Window.width - self.width * self.open_progress)
 ...
 AttributeError: module 'kivy.core.window' has no attribute 'width'
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 249, in create_handler
     return eval(value, idmap), bound_list
   File "<string>", line 7, in <module>
 
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 615, in _apply_rule
     rctx['ids'])
   File "/Users/temitayoadefemi/untitled6/lib/python3.7/site-packages/kivy/lang/builder.py", line 254, in create_handler
     cause=tb)
 

Process finished with exit code 1