I have an old struts 1 app that has always been built using Ant, which I\'m converting to use Maven instead. The structure of my app is modular, with dependency management i
An addition to the other answers that didn't work for me: In my case the error occurred due to permission errors. The project got deployed while the tomcat was running as root, later when started as tomcat user I got the error from the question title.
Solution in my case was to set the right permissions, e.x. on a unix system:
cd
chown -R *