Exception Due to linking to struts.dtd file from internet / local

In the morning I ran into Exception while struts2 apps were running .... the application was working yesterday

Problem loading some struts2-jquery bar even though they exist in WEB-INF / lib

After browsing, I came up with some solution for making changes to struts.xml <!DOCTYPE ....>

how change

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

      

        
        
        
      

    

to

<!DOCTYPE struts SYSTEM "../dtds/struts-2.0.dtd">

      

        
        
        
      

    

or

<!DOCTYPE struts SYSTEM "struts-2.0.dtd">

      

        
        
        
      

    

For local links struts.dtd but none of them work.

Console exception:

Unable to load configuration. - action - file:/D:/.........plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/XXXXXXXX/WEB-INF/classes/struts.xml:25:88
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)
    at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:360)
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:403)
    at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:48)
    at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:273)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:254)
    at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:372)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:98)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4584)
    at org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5262)
    at org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5257)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: Error building results for action getGroups in namespace  - action - file:/D:/T....plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/XXXXXXX/WEB-INF/classes/struts.xml:25:88