I've recently returned after a several-year absence and have tried Diplomacy in the Crafter's Forum in Khal but keep seeing "you need 1 point in Crafting Diplomacy" (or so many words) but I can't figure out how to get that one point. Did I miss a quest or something somewhere? Thanks for your time!
That means you need to have at least 1 Crafters Presence in order to talk to the NPC. This usually can be taken care of by obtaining a piece of diplomacy clothing/jewelry/hand held item that grants you at least one crafters presence. As you level up the presence needed to talk to some npc's increases.