用户列表映射&lt；com.google.android.gms.maps.MapView&gt；：不存在可朗读的文本

I'm trying to create a route planner app and I'm getting the error 用户列表映射<；com.google.android.gms.maps.MapView>；：不存在可朗读的文本' I don't understand what this error is telling more nor do I understand what I need to do for it.

这是我的XML代码：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white">



    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:weightSum="100"
        android:background="@color/white">

        <androidx.recyclerview.widget.RecyclerView
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="50"
            android:id="@+id/user_list_recycler_view">

        </androidx.recyclerview.widget.RecyclerView>

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="50"
            android:id="@+id/map_container">

            <com.google.android.gms.maps.MapView
                xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:id="@+id/user_list_map"/>
        </RelativeLayout>


    </LinearLayout>

    <ProgressBar
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/progressBar"
        android:layout_centerInParent="true"
        android:visibility="gone"/>

</RelativeLayout>