我的Android应用程序的styles.xml的第5行中有一个错误，内容如下

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
    <style name="LaunchTheme" parent="Theme.AppCompact.Light.NoActionBar">
        <!-- Show a splash screen on the activity. Automatically removed when
             the Flutter engine draws its first frame -->
        <item name="android:windowBackground">@drawable/launch_background</item>
    </style>
    <!-- Theme applied to the Android Window as soon as the process has started.
         This theme determines the color of the Android Window while your
         Flutter UI initializes, as well as behind your Flutter UI while its
         running.

         This Theme is only used starting with V2 of Flutter's Android embedding. -->
         <style name="NormalTheme" parent="Theme.MaterialComponents">
            <item name="android:windowBackground">?android:colorBackground</item>
        </style>
</resources>

我正在使用Flutter构建一个android应用程序。此错误阻止我访问某些小部件。如何解决此问题？我不知道为什么会出现此错误，也不知道是什么原因导致了此错误。
这是

的屏幕截图
通常，我不应该有这些错误，因为它是Flutter框架本身生成的文件。我从来没有遇到过这样的问题。但是，我注意到，每当我删除带有item标记的行时，错误就会清除