[GeoNode-users] Error 405 when trying to display layer, map

[FERRARI Hugo]

Dear Geonode users and developpers

I installed geonode on an Ubuntu 14.04.1. I can upload data as a 
registered user but when triying to display It  the only thing I can get 
is this message
     "Unavailable layer <layername> removed."
followed by a 405 error from the console.
     " PUT <IP>/gs/rest/styles  405 METHOD not allowed"

Thank you for your help

Hugo