org.apache.tiles.definition.DefinitionsFactoryException: XML error reading definitions.] with root cause org.xml.sax.SAXParseException;

I have created a Project and it runs fine at home, then I brought it to school to report. But when I import it, the error as shown below. Computers in schools have limited network, is it the cause of the error?

Exception:

SEVERE: Servlet.service() for servlet [spring] in context with path [/MusicStore] threw exception [Request processing failed; nested exception is org.apache.tiles.definition.DefinitionsFactoryException: XML error reading definitions.] with root cause org.xml.sax.SAXParseException; systemId: http://ift.tt/1hz4rZF; lineNumber: 1; columnNumber: 3; The markup declarations contained or pointed to by the document type declaration must be well-formed. at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source) at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.scanDecls(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.scanDTDExternalSubset(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)

general.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE tiles-definitions PUBLIC
       "-//Apache Software Foundation//DTD Tiles Configuration 3.0//EN"
       "http://ift.tt/1hz4rZF">
<tiles-definitions>
    <definition name="common" template="/WEB-INF/jsp/layout.jsp">
        <put-attribute name="title" value="Sample Title" />
        <put-attribute name="header" value="/WEB-INF/jsp/header.jsp" />
        <put-attribute name="head-link" value="/WEB-INF/jsp/head-link.jsp" />
        <put-attribute name="left" value="/WEB-INF/jsp/left.jsp" />
        <put-attribute name="content" value="" />
        <put-attribute name="footer" value="/WEB-INF/jsp/footer.jsp" />
    </definition>
    <definition name="home" extends="common">
        <put-attribute name="title" value="Home" />
        <put-attribute name="left" value="/WEB-INF/jsp/lefthome.jsp" />
        <put-attribute name="content" value="/WEB-INF/jsp/home.jsp" />
    </definition>
    <definition name="admin" extends="common">
        <put-attribute name="title" value="Admin page" />
        <put-attribute name="left" value="/WEB-INF/jsp/admin.jsp" />
    </definition>
    <definition name="hr" extends="common">
        <put-attribute name="title" value="Human Resource Management" />
        <put-attribute name="content" value="/WEB-INF/jsp/hr.jsp" />
    </definition>
    <definition name="productmanager" extends="common">
        <put-attribute name="title" value="Product Management" />
        <put-attribute name="content" value="/WEB-INF/jsp/productmanager.jsp" />
    </definition>
    <definition name="cart" extends="common">
        <put-attribute name="title" value="Cart" />
        <put-attribute name="content" value="/WEB-INF/jsp/cart.jsp" />
    </definition>
    <definition name="addalbum" extends="common">
        <put-attribute name="title" value="Add new album" />
        <put-attribute name="content" value="/WEB-INF/jsp/addalbum.jsp" />
    </definition>
    <definition name="adduser" extends="common">
        <put-attribute name="title" value="Add new user" />
        <put-attribute name="content" value="/WEB-INF/jsp/adduser.jsp" />
    </definition>
    <definition name="updatealbum" extends="common">
        <put-attribute name="title" value="Update album" />
        <put-attribute name="content" value="/WEB-INF/jsp/updatealbum.jsp" />
    </definition>
    <definition name="updateuser" extends="common">
        <put-attribute name="title" value="Update user" />
        <put-attribute name="content" value="/WEB-INF/jsp/updateuser.jsp" />
    </definition>
    <definition name="login" template="/WEB-INF/jsp/login.jsp">
    </definition>
</tiles-definitions>

spring-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://ift.tt/GArMu6"
    xmlns:mvc="http://ift.tt/1bHqwjR" xmlns:xsi="http://ift.tt/ra1lAU"
    xmlns:aop="http://ift.tt/OpNdV1" xmlns:context="http://ift.tt/GArMu7"
    xmlns:jee="http://ift.tt/OpNaZ5" xmlns:lang="http://ift.tt/OGfeTY"
    xmlns:p="http://ift.tt/1jdM0fE" xmlns:tx="http://ift.tt/OGfeU2"
    xmlns:util="http://ift.tt/OGfeTW"
    xsi:schemaLocation="http://ift.tt/GArMu6 http://ift.tt/1jdM0fG
        http://ift.tt/OpNdV1 http://ift.tt/1feTlrW
        http://ift.tt/GArMu7 http://ift.tt/1jdLYo7
        http://ift.tt/OpNaZ5 http://ift.tt/1feTnjL
        http://ift.tt/OGfeTY http://ift.tt/1feTlrY
        http://ift.tt/OGfeU2 http://ift.tt/18tm2Tg
        http://ift.tt/OGfeTW http://ift.tt/1feTls0
        http://ift.tt/1bHqwjR
        http://ift.tt/1fmimld
      ">

    <context:component-scan base-package="com" />

    <!-- <tx:annotation-driven transaction-manager="hibernateTransactionManager" /> -->

    <!-- spring tile -->
    <bean class="org.springframework.web.servlet.view.UrlBasedViewResolver"
        id="viewResolver">
        <property name="viewClass">
            <value>
                org.springframework.web.servlet.view.tiles2.TilesView
            </value>
        </property>
    </bean>
    <bean class="org.springframework.web.servlet.view.tiles2.TilesConfigurer"
        id="tilesConfigurer">
        <property name="definitions">
            <list>
                <value>/WEB-INF/defs/general.xml</value>
            </list>
        </property>
    </bean>
    <!-- To prevent browser's back button on displaying secured resource after 
        logout -->
    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="cacheSeconds" value="0" />
    </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.hibernate3.annotation.AnnotationSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="packagesToScan">
            <list>
                <value>com.musicstore.model</value>
            </list>
        </property>
        <property name="configurationClass">
            <value>org.hibernate.cfg.AnnotationConfiguration</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.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <!-- Spring Internationalizations -->

    <bean id="messageSource"
        class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <property name="basename" value="classpath:messages" />
        <property name="defaultEncoding" value="UTF-8" />
    </bean>

    <bean id="localeResolver"
        class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
        <property name="defaultLocale" value="en" />
    </bean>

    <bean id="localeChangeInterceptor"
        class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
        <property name="paramName" value="language" />
    </bean>
    <bean id="handlerMapping"
        class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
        <property name="interceptors">
            <ref bean="localeChangeInterceptor" />
        </property>
    </bean>

</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://ift.tt/ra1lAU"
    xmlns="http://ift.tt/nSRXKP" xmlns:web="http://ift.tt/LU8AHS"
    xsi:schemaLocation="http://ift.tt/nSRXKP http://ift.tt/1eWqHMP"
    id="WebApp_ID" version="3.0">
    <display-name>MusicStore</display-name>
    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>classpath:log4j.xml</param-value>
    </context-param>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/security-context.xml
            /WEB-INF/spring-servlet.xml
        </param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>

    <!-- Define a filter to enable Spring Security, be sure to use the suggested 
        name 'springSecurityFilterChain' -->
    <filter>
        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>springSecurityFilterChain</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>
</web-app>

Thanks!