Web Page Composer Anonymous site error :'wpc:getDisplayName'
I would like to use the new Web Page Composer to implement an anonymous site, I have followed all the configuration in order to make portal anonymous, I have made a test role with a km iView that open an html file and everything is ok.
At this point I have created my site whit WPC I have tried it whit a standard user (authenticated) in order to verify that the site runs correctly and after that I have connected my site to the anonymous role.
I have also followed the guide Define permission in the PCD and Set initial permissions for folders.
When I call my anonymous portal I can see the header the first, second and third level, in the context area I can see the header of my WPC page, (the rss button, print link, email link ) but instead of the content page I have the following error:
Cannot render container : com.sap.engine.lib.xml.util.NestedException: Function with name 'wpc:getDisplayName' not found in context library
Do I miss something?
Thanks and regards