I have stacked and validated the cairn stones at least 20 times, in various orders. I have tried with 3 and 4 stones. I have reverted back to old saves and also carried out other quests and returned, to no avail.

I am unable to move forward with the story until this is fixed.

I have stacked and validated the cairn stones at least 20 times, in various orders. I have tried with 3 and 4 stones. I have reverted back to old saves and also carried out other quests and returned, to no avail.

I am unable to move forward with the story until this is fixed.