Hi, everyone.
We are aware of a bug currently where users are receiving an unknown error when attempting to open packs. This results in the user losing the currency and not receiving the packs. We are working on a solution for this bug now.
We encourage users to please not make purchases of card packs until we update that the issue is resolved.
If you have encountered this error in-game and lost currency, fill out this form.
We apologize for the inconvenience and we will update as soon as we have fixed the problem.