stockquote doesn't show any data

[grezax]

Kubuntu 14.10 64 bit

KDE 4.14.1

apt-cache policy plasma-widget-stockquote
plasma-widget-stockquote:
  Installato: 2.1-0ubuntu3
  Candidato: 2.1-0ubuntu3
  Tabella versione:
 *** 2.1-0ubuntu3 0
        500 http://archive.ubuntu.com/ubuntu/ utopic/universe amd64 Packages
        100 /var/lib/dpkg/status

when the widget is displayed it doesn't show stocks data any more,
all you can see is an empty widget like in picture:

http://s1.postimg.org/lekckb7i7/stockquote.png

settings are populated and untouched since they used to work, I didn't change them,
but retrieving information from yahoo finance seems not working anymore.

thank you