Board Thread:Questions and Answers/@comment-173.17.106.144-20171124042213/@comment-121.58.234.198-20180108032901

Pent00x wrote: It seems to be a bug in the game. I am on Android and I experience the same problem from time to time, not only in duels, but also in underworld raids, where it shows a "CONNECTION ERROR: Failed to download configuration file" message despite having a working internet connection. For the "you need an internet connection" problem in duels, don't worry (unless if the notification pops up IMMEDIATELY after pressing fight)

To solve this, just keep on pressing "Fight"until you can fight the duel (although the chances for the fight to work is around 1 out of 5)