I have the same problem with my LG 60" 3d Smart TV (60LB6520-TB). At the end of October I updated the software to 05.00.15 / webOS TV Version 1.4.0-2507 (afro-ashley).
Since the update, vTuner does not load. It goes to a screen with a white background that says:
In the last day or so, the vTuner app has disappeared from the app ribbon and the premium section.
LG Smart World support told me to use a wifi hotspot and to change my country setting. Nothing worked.
I wrote again and said:
It looks like our brothers and sisters with Sony gadgets have around the same time suffered the loss of vTuner as well:
http://www.sony.co.uk/support/en/content/cnt-hn/prd-tvhc/vTuner-suspended