idea中使用struts2，配置文件显红?报错

我在idea中使用struts2，配置文件一直报错，之前都没有报错的，请问怎么解决，代码错误如图

代码如下：    

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
        "http://struts.apache.org/dtds/struts-2.1.7.dtd">

<struts>
    <constant name="struts.multipart.maxSize" value="100000000"/>

    <package name="upload" extends="struts-default">
        <action name="uploadImg" class="com.minxuan.mitesofor.action.UploadAction"
                method="uploadImg">
        </action>
    </package>

    <package name="order" extends="struts-default,json-default" namespace="/">

        <!-- Order模块 -->
        <!-- 上传Order信息 -->
        <action name="saveorder" class="com.minxuan.mitesofor.action.OrderAction"
                method="saveOrder"></action>
        <!-- 获取所有的Order信息，json数据返回 -->
        <action name="listorder" class="com.minxuan.mitesofor.action.OrderAction"
                method="listOrder">
            <result name="success" type="json">
                <param name="root">result</param>
            </result>
        </action>

        <!-- <action name="delorder" class="com.minxuan.mitesofor.action.OrderAction"
            method="delOrder"></action> <action name="updateorder" class="com.minxuan.mitesofor.action.OrderAction"
            method="updateOrder"></action> <action name="listorderid" class="com.minxuan.mitesofor.action.OrderAction"
            method="listOrderId"></action> -->

    </package>

    <package name="repair" extends="struts-default,json-default" namespace="/">
        <!-- Repair模块 -->
        <!--上传Repair信息 -->
        <action name="saveRepair" class="com.minxuan.mitesofor.action.RepairAction"
                method="saveRepair"></action>
        <!--获取所有的Repair信息 -->
        <action name="listRepair" class="com.minxuan.mitesofor.action.RepairAction" method="listRepair">
        </action>
    </package>
    <!--管理员action-->
    <include file="struts-admin.xml"/>
    <!--文章action-->
    <include file="struts-article.xml"/>
    <!--文章类型-->
    <include file="struts-articleType.xml"/>
    <!--荣耀信息-->
    <include file="struts-honor.xml"/>
    =======
    <constant name="struts.multipart.maxSize" value="100000000" />

    <package name="upload" extends="struts-default">
        <action name="uploadImg" class="com.minxuan.mitesofor.action.UploadAction" method="uploadImg">
        </action>
    </package>

    <package name="order" extends="struts-default,json-default"	namespace="/">

        <!-- Order模块 -->
        <!-- 上传Order信息 -->
        <action name="saveorder" class="com.minxuan.mitesofor.action.OrderAction" method="saveOrder"></action>
        <!-- 获取所有的Order信息，json数据返回 -->
        <action name="listorder" class="com.minxuan.mitesofor.action.OrderAction" method="listOrder">
            <result name="success" type="json">
                <param name="root">result</param>
            </result>
        </action>

        <action name="delorder" class="com.minxuan.mitesofor.action.OrderAction" method="delOrder"></action>
        <action name="updateorder" class="com.minxuan.mitesofor.action.OrderAction" method="updateOrder"></action>
        <action name="listorderid" class="com.minxuan.mitesofor.action.OrderAction" method="listOrderId"></action>

    </package>

    <package name="repair" extends="struts-default,json-default" namespace="/">
        <!-- Repair模块 -->
        <!--上传Repair信息 -->
        <action name="saveRepair" class="com.minxuan.mitesofor.action.RepairAction" method="saveRepair"></action>
        <!--获取所有的Repair信息 -->
        <action name="listRepair" class="com.minxuan.mitesofor.action.RepairAction" method="listRepair"></action>
    </package>
</struts>