Trade with visitor completed even user just click trade button and not actually trade anything.
When user launch the game then make progress until visitor come to the village. There will be trade tutorial appear. Notice that trade with visitor completed even user just click trade button and not actually trade anything.
Please see this attachment for more details in this link.
Version:
0.23.0.9d
Fixed In:
Ya - that's fair - thought the important bit is introducing the player to the trading system - maybe I reword the tip.