Spring Webflow - ошибка файла spring-context.xml

У меня есть проект, использующий Spring Webflow, и я получаю сообщение об ошибке в файле spring-context.xml.

Ошибка:

cvc-complex-type.2.4.c: Соответствующий подстановочный знак является строгим, но не может быть найдено объявление для элемента 'webflow: flow-executor'. spring-context.xml / GestaoAcademicaWeb / WebContent / WEB-INF, строка 76 XML

cvc-complex-type.2.4.c: Соответствующий подстановочный знак является строгим, но не может быть найдено объявление для элемента 'webflow: flow-registry'. spring-context.xml / GestaoAcademicaWeb / WebContent / WEB-INF, строка 78 XML

Мои попытки исправить проблему в строках 76 и 78 привели к возникновению других ошибок. Есть предположения, что не так с этим файлом?

Это файл spring-context.xml.

   <?xml  version = "1.0" encoding = "UTF-8"?>
    <beans xmlns = "http://www.springframework.org/schema/beans"
    xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop = "http://www.springframework.org/schema/aop"
    xmlns:context = "http://www.springframework.org/schema/context"
    xmlns:jee = "http://www.springframework.org/schema/jee"
    xmlns:lang = "http://www.springframework.org/schema/lang"
    xmlns:p = "http://www.springframework.org/schema/p"
    xmlns:tx = "http://www.springframework.org/schema/tx"
    xmlns:util = "http://www.springframework.org/schema/util"
    xmlns:mvc = "http://www.springframework.org/schema/mvc"
    xmlns:webflow = "http://www.springframework.org/schema/webflow-config"
    xsi:schemaLocation = "http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/jee 
        http://www.springframework.org/schema/jee/spring-jee.xsd
        http://www.springframework.org/schema/lang 
        http://www.springframework.org/schema/lang/spring-lang.xsd
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/util 
        http://www.springframework.org/schema/util/spring-util.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        http://www.springframework.org/schema/webflow-config
        http://www.springframework.org/schema/webflow-config/spring-webflow-config-2.0.xsd">

    <context:annotation-config />
    <context:component-scan
        base-package = "br.com.devmedia.gestaoacademicaweb" />


    <bean id = "jspViewResolver"
        class = "org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name = "viewClass"
            value = "org.springframework.web.servlet.view.JstlView" />
        <property name = "prefix" value = "/WEB-INF/views/" />
        <property name = "suffix" value = ".jsp" />
    </bean>

    <bean id = "propertyConfigurer"
        class = "org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
        p:location = "/WEB-INF/jdbc.properties" />

    <bean id = "dataSource"
        class = "org.apache.commons.dbcp.BasicDataSource" destroy-method = "close"
        p:driverClassName = "${jdbc.driverClassName}"
        p:url = "${jdbc.databaseurl}" p:username = "${jdbc.username}"
        p:password = "${jdbc.password}" />

    <bean id = "sessionFactory"
        class = "org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name = "dataSource" ref = "dataSource" />
        <property name = "configLocation">
            <value>classpath:hibernate.cfg.xml</value>
        </property>

        <property name = "hibernateProperties">
            <props>
                <prop key = "hibernate.dialect">${jdbc.dialect}</prop>
                <prop key = "hibernate.show_sql">true</prop>
            </props>
        </property>
    </bean>

    <tx:annotation-driven />
    <bean id = "transactionManager"
        class = "org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name = "sessionFactory" ref = "sessionFactory" />
    </bean>

    <webflow:flow-executor id = "flowExecutor" />

    <webflow:flow-registry id = "flowRegistry">
        <webflow:flow-location
            path = "/WEB-INF/flows/inserirDocente.xml" id = "inserirDocente" />
    </webflow:flow-registry>

    <bean
        class = "org.springframework.webflow.mvc.servlet.FlowHandlerMapping">
        <property name = "flowRegistry" ref = "flowRegistry" />
        <property name = "order" value = "0" />
    </bean>

    <bean
        class = "org.springframework.webflow.mvc.servlet.FlowHandlerAdapter">
        <property name = "flowExecutor" ref = "flowExecutor" />
    </bean>

    <bean name = "docenteController"
        class = "br.com.devmedia.gestaoacademicaweb.control.DocenteController" />

</beans>