UI accessibility Checker (UIAccess) Element has not name

Hi

I try to use UI Access Checker (UIAccess) but I continue to have this errors on xaml example (above)

Can you help me?

<GridView x:Name="gridFullScreen"  Margin="50"
                  Visibility="Visible"  SelectionMode="None" 
              ItemsPanel="{StaticResource GridViewItemsPanelTemplateHorizontal}"><GridView.GroupStyle><GroupStyle><GroupStyle.Panel><ItemsPanelTemplate><VariableSizedWrapGrid Orientation="Vertical" Height="Auto" /></ItemsPanelTemplate></GroupStyle.Panel></GroupStyle></GridView.GroupStyle><Grid x:Name="grid1"><TextBlock Text="grid1" /></Grid><Grid x:Name="grid2"><TextBlock Text="grid1" /></Grid></GridView>