When selecteing Build Other Projects (Extended) checkbox, the related configuration fields appear. But an "Error" hyperlink is also displayed.
When clicking on the hyperlink, the following HTTP Error is schown :
HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: The descriptor registry with the called getId() method is not used. The descriptor redefines its own getInputMetric() method.
org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:597)
...etc...