Fix crash

Author: yaira2

src/Files.App/UserControls/NavigationToolbar.xaml

@@ -225,6 +225,7 @@
 		<controls:Omnibar
 			x:Name="Omnibar"
 			Grid.Column="1"
+			x:Load="{x:Bind ViewModel.LoadOmnibar, Mode=OneWay}"
 			CurrentSelectedModeName="{x:Bind ViewModel.OmnibarCurrentSelectedModeName, Mode=TwoWay}"
 			IsFocusedChanged="Omnibar_IsFocusedChanged"
 			ModeChanged="Omnibar_ModeChanged"

src/Files.App/ViewModels/UserControls/NavigationToolbarViewModel.cs

@@ -197,6 +197,10 @@ public string? PathText
 			}
 		}
 
+		// Workaround to ensure Omnibar is only loaded after the ViewModel is initialized
+		public bool LoadOmnibar =>
+			true;
+
 		private string? _OmnibarCommandPaletteModeText;
 		public string? OmnibarCommandPaletteModeText { get => _OmnibarCommandPaletteModeText; set => SetProperty(ref _OmnibarCommandPaletteModeText, value); }