I've made an upgrade from Kubuntu 14.04 to 16.04 it worked ok. But later I got a message that said something like "Language support is not complete do you want to install now?" If I accept, the process begins, but almost immediately a message appears, saying "Updates impossible". The options are "Ok" and "More info". Ok ends the process and "More info" does not do anything.
What can I do? The messages may not be exactly the same because my installation is in Spanish.