NBA Dunk funktioniert nicht

The first-of-its-kind digital trading card app lets you collect thousands of officially licensed digitally autographed cards from your favorite stars and rookies, digital cards with pieces of memorabilia (just like the real thing), and rare cards and inserts in multiple colors.  Trade up to 16 cards at a time to collect your favorite players, complete sets, acquire rare cards, or build your ultimate contest lineup. 
Get free coins every day just for signing in, and earn free packs, rewards and coins for completing sets, making trades, scoring in contests and so much more!  Your cards score points as the players on the court do. 

Interact with fans from around the globe by browsing their inventories, making offers and trading.  Panini, the leader in sports and entertainment collectibles, brings NBA trading cards to the digital world.  New content is released every day from popular Panini lines such as NBA Hoops, Donruss, Select, Immaculate, National Treasures and more!  Collect, trade, play & dominate the league with NBA Dunk!  The only exclusive and officially licensed trading card and collecting app of the NBA!  NBA Dunk features the league’s current stars, all-time legends and the stars of tomorrow!  Be the coach and use your collection to enter real-time contests.  Find rare cards and special inserts tied to special events and key performances, and relive the season as it happens with Panini Instant inserts which feature cards of top performances and moments after they happen!