Player: Durain Atek
The Player Tools (such as Diagnoze Withering) are not accessible for some players / races. I have a hunch that it only applies to non-human standard races.
It did not work for a Half Orc and Dwarf I checked with, and did work with a Human PC.
When I log in after a reset now, it says: 'Acquired Item: Shield Dwarf Skin'. This is new, so might be related. The item does not physically show in my inventory, but might be DM hidden (?).
Edit: I can use the Crafting Tool to assign the Player Tool to a slot, but I am unable to put the selected tool in a quickslot / select it manually. It simply does not show where it normally does.