if you install mask of betrayer this problem will appear(i dont know if you install storm of zehir or mysteries of westgate this will happen or not,but probably not,cause mask of betrayer was the first who had this problem and game makers probably corrected that problem in future games).
even if you unistall the game and install it again and dont install mask of betrayer ,then pass that part of the game,if you install mask of betrayer again after that you will encounter to many alike problems again ,that if game is supposed to update a mission with you taking an item in the game,game will never update mission and the game will stick and you cant proceed.if you update the game it probably solve the problem(of course you must countinue the game from a save before you took the shard from chest),and if update didnt helped ,you just should play the game without installing the mask of betrayer.if you insist to install mask of betrayer for items that it contains,after installation of mask ,the game has a program that could make or edit already exist games(Original neverwinter2.mask of betrayer.storm of zehir....and and everything you or others maked with this program.i forgot its name but you can access to it simply fom main menu.open a mod file(mod files contains all information of game,map,people in map,bluepoints that a npc,music,item,camera,people who will be load later... and items in places)from original nwn2,(can be recogniszed by their name),with that program(this files are located in a folder name models were game is install.each mod file cotains several location of the game)open the mod that contains the location you want to place your items there and then find whatever you want from item list and put it on the ground in that place and then save the mod file(remember to make copy original of that mod file before do anything).if you want alter items abbilites,make a moddle or campaign blue print of them,then go to moddle or campain items list and find that item you copied there and place what abbilite you want on it and place it on a location and save the moddle file.now make a copy of the folders that contains files that contains mask items(you made copy from items,but items personalitis are refrence to other items and you need to have them that game can understand items personalitis,if not you may put an armor and game mistok it with a cloth and therefor it has no armor protaction).this folders have Materials word in their name,those for mask have an x1 word also in there name to separate them from original nwn2 campaign material folders,there are about five or six of them,copy them somewhere.also copy the file mode you altered and placed items on it(you better use first modfile,tutorial model,that could take items in beginning of game).now unistall game and install it again,but dont install mask,copy your mod file instead of original mode,then copy material file in the folder that contains such files.now begin the game.if you already entered a place that you have placed items in there via model,from before, if now load game and go there again,there is
nothing there,because game save a mod when you enter one of places that it contains,and all of properties of that mod will be save in save file.you must load game from a save that you never entered your mod.now when you go to that place for the first time you see whatever you placed there.