BxMS 6.4 on EAP7.0 "NoClassDefFoundError: Failed to link org/kie/api/osgi/Activator ... : org/osgi/framework/BundleActivator"

WARN  [org.jboss.modules] (EJB default - 1) Failed to define class org.kie.api.osgi.Activator in Module "deployment.kie-server.war:main" from Service Module Loader: java.lang.NoClassDefFoundError: Failed to link org/kie/api/osgi/Activator (Module "deployment.kie-server.war:main" from Service Module Loader): org/osgi/framework/BundleActivator
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:444)