Byteman 4.0.16 removes the JBoss Modules plugin from the release, in the process removing a dependency on the jboss-modules jar. The plugin has never been fully functional on JDK9+ releases. Anyone wishing to use the plugin as is should continue to use earlier releases. Alternatively, you can revert to using the Byteman 3.0.19 which runs on JDK8- releases and includes a fully working version of the plugin.
More details are provided in the Release Notes.