Pentaho 5 blank page

Hi guys, this morning I built in my version of the plugin for the Pentaho EE marketplace. I have installed a number of plugins, restart Pentaho as requested, but when I launch the any of the installed plugins I get an annoying blank page. Why is this happening? Is there a problem with tomcat or something else? Let me know. Thank you.


http://lord112.altervista.org/img.png -> Image