Well.... I must restart the quest and do all again... I see a lot of people here with the same problem and I must say that it is what SE go to do:_________________

Yes, nothing. Thanks to my FC and friends I can do all again because SE don't go to help us, the players. We don't abandon the quest, We lost the progress for a bug.
The normal with this is that SE study the problem and restart us the quest where we lost all.