I am having problems with the Nithral fight.
When the fight begins, Nithral won't attack. He is just standing there.
When his health is close to zero, he shields himself. After killing the hunt dogs, the shield won't drop.
Is somebody else having the same problem? Is this only after the patch 1.11?
I tried to go back to patch 1.10 and 1.08.4 but the game won't start.
Is this a known problem and is there a solution?
Thanks in advance for your answer

1)Go to Galaxy Launcher!
2)Go inside your Library(where your games are)
3)Click on " MORE " button in the drop down menu go to " MANAGE " and click on " VERIFY/REPAIR "

This method will fix your problem with Nithral.
I hope everything will be ok after that!

I am happy for you!So now enjoy this masterpiece!!!!

So I installed after a pause Witcher 3'm quest wandering in darkness and with Nithral AGAIN Bugle on patch 1.12.1 and not continue the quest :(

I am having problems with the Nithral fight.
When the fight begins, Nithral won't attack. He is just standing there.
When his health is close to zero, he shields himself. After killing the hunt dogs, the shield won't drop.
Is somebody else having the same problem? Is this only after the patch 1.11?
I tried to go back to patch 1.10 and 1.08.4 but the game won't start.
Is this a known problem and is there a solution?
GOG will not allow me to press repair in the launcher
Thanks in advance for your answer

NEVERMIND ISSUE RESOLVED

I did this quest 4-6 weeks ago with a clean 1.22 install and no mods and had no problems.
If you have mods installed, remove them and update the game. Do a verify/repair in Galaxy afterwards.