Can't access explorer.nuxeo.com help since 7.1

Not sure it's a Studio issue, a Documentation issue, an Explorer issue, ...

In Studio, when you're in automation and you ask for the online help for an operation, you have an error. For example, Studio project is set to 7.2 platform, and I click the "See online help" link for the Services > Tag Document operation:

• The page that is open displays:

  {"entity-type":"exception","code":"javax.ws.rs.WebApplicationException","status":500,"message":"com.sun.jersey.api.MessageException: A message body writer for Java class org.nuxeo.ecm.webengine.WebException, and Java type class org.nuxeo.ecm.webengine.WebException, and MIME media type text/html was not found"}
  
  

• The URL is http://explorer.nuxeo.org/nuxeo/site/distribution/Nuxeo%20DM-7.2/viewOperation/Services.TagDocument

(Not knew, exists since 7.1, but not sure it's already reported)