Is this a
Tomcat server? And are you using
Java 11 or higher?
In Java 11, Oracle removed all of the
JEE code from the JDK and JRE. That was basically everything that was in the
java.se.ee module but not in the
java.se module, and included modules like
java.activation,
java.xml.ws and
java.xml.bind. That last one is better known as JAXB. In other words, since Java 11, JAXB is no longer part of the JDK / JRE. You need to include a dependency for it now.
I did a quick search on Google for replacement dependencies, and I found this article by our own Jesper de Jong:
https://jesperdj.com/2018/09/30/jaxb-on-java-9-10-11-and-beyond/ that explains the problem in more detail, and mentions the dependencies you need.