Dear Radu,
thanks for you reply, after the activation of debug I receive a single allert that is:
Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method adminuser::register_custom_menu_page() should not be called statically in /home/nutriti0/public_html/wp-includes/plugin.php on line 525
And this is what I find on line 525:
call_user_func_array($the_[‘function’], array_slice($args, 0, (int) $the_[‘accepted_args’]));
Means something to you?
Many thanks
Francesca