Dear Players, We are aware of the problem with the Event Collections. We have already sent all available information to the developers and hope for a quick solution to the problem. Until the announcement of the fix, we ask you to refrain from activating temporary collections, even if all necessary items are collected.
Dear players, If after the technical work the event collection haven’t been activated, you need to create an appeal to the Support Service: https://eu.4gamesupport.com/ We will help you to restore it.