If it is fast to reinstall RSA, I would do so, but I think it is not.
Anyway, reinstalling sounds funny.
But just in case this is a proprietary bug in the IBM software, maybe you can temporarily extract that DispatcherServlet.properties into a location that you are sure is in the classpath.
Below is a code from
https://github.com/spring-projects/spring-framework/blob/master/spring-webmvc/src/main/java/org/springframework/web/servlet/DispatcherServlet.java.
Based on above, the DispatcherServlet.properties must be in the same path as the DispatcherServlet.class file.