Description: I am not able to open the door at the 6th level of the dungeon. I do have the threes stones into my inventory reserve but I do not have the option to use the stone. Describe the issue that is occurring. I played to the game some months before and I've been able to reach the 6th level on the dungeon. I recently continue to play to the game, with TWM I + II and I did completed TWM. I have return to the donjon, until the door at the 6th level and I had a "dialog" with the door. At that moment I have been able to place to stone but one was missing. I decided so to remove the stone, to go to the 4th level in order to grab the missing stone. Once done I've return to the 6th level, front of the door, but then no option was selectable. It seems that the game do not recognize my iventory items. I took a look into it and I saw that these stones are stores into the so called "Reserve Inventory". The 3 stones are here and some even appears in double (which may be the cause of the problem). Nevertheless, I am not able to place any of this stone on the door ! Steps to Reproduce the Issue: Maybe to have twice the same stone into your inventory.