DS-021 The quest "Collect the Goods" can't be completed

The quest "Collect the Goods" (Quest ID = 101, Map = 30202) can't be completed because the NPC "Song Zizheng" asks me to choose a reward to complete the quest but he doesn't offer any. When I look at the quest description in the "Quest Management" tab, I see under "Quest Reward" the 5 possible rewards (one per class): -Cotton Glove -Yellow Satin Glove -Pure Frost Glove -Emerald Reflection Glove -Blue Vine Glove