[Koha] Generate labels

Hi!I use Koha for an institutional library so I try to use the label generator but when I click on this part of the administrator interfaz, the page mak an error. I don't know how can I solve this problem or what it is happening. Hope you can help me. -- Sent from: http://koha.1045719.n5.nabble.com/Koha-general-f3047918.html