Hello, after searching for information on internet I read that it is most likely a bug related to the enemy silence skill, I have tried loading the game, teleporting, deleting the appdata files, casting silence on an ally and leaving the area, killing and revive the characters, rest in the camp, restart the game, reinstall it and nothing has solved it, I have not found solutions oninternet either.
I'm almost sure that the problem was caused in the crypt at the beginning of the game where the door was blocked,
some skeletons cast silence before reaching the Withered NPC.
Thank you