Upgrade from struts 2.3.37 to struts 2.5.20 issue.

hi there, encounter issue when .ear file deployed in Weblogic 12.1.3.0.0 server. Error: Struts Dispatcher cannot be found... Upgraded the necessary jar files such as struts core, json and updates the necessary properties file. but still encounter the struts dispatcher error. any idea what did

Upgrade from struts 2.3.37 to struts 2.5.20 issue.

encounter issue when .ear file deployed in Weblogic 12.1.3.0.0 server. Error: Struts Dispatcher cannot be found... Upgraded the necessary jar files such as struts core, json and updates the necessary properties file. but still encounter the struts dispatcher error. any idea what did I missed out