Allo there,
This is a known bug and Bungie is investigating. They have stated it will be retroactively fixed after the event ends.
https://www.bungie.net/en/Forum/Post/263470458/0/0
[quote]The "Dawning" triumph for the Reveler title cannot be completed. This will be retroactively fixed for all players after the Dawning ends.[/quote]
English
-
Thank you, True soul!