Why then i try to add Left 4 Dead 2 items in bot and Walking Dead Season 2, i get these messages

Dispenser 112 (Lv.2): Some item information are unavailable, please try again later. 21:40:18
Dispenser 112 (Lv.2): False 21:40:18

Please help me fast

Please make sure your inventory is public, and remember to uncheck the 'hide gift' option.