Automation Operations Online Help are broken

• I go to Automation Chain category
• I create a new Automation Chain
• I add a new Operation to my chain
• I click on Online Documentation

Problem:

• the link: http://explorer.nuxeo.org/nuxeo/site/distribution/Nuxeo%20DM-5.6/viewOperation/Document.SetLifeCycle is broken
  org.nuxeo.ecm.webengine.WebException at org.nuxeo.ecm.webengine.WebException.wrap(WebException.java:180) at org.nuxeo.ecm.webengine.WebException.wrap(WebException.java:161) at org.nuxeo.ecm.webengine.app.WebEngineExceptionMapper.toResponse(WebEngineExceptionMapper.java:45) at com.sun.jersey.spi.container.ContainerResponse.mapException(ContainerResponse.java:429) at