I need help with this event. I completed it before but there was a bug. When I go to rewards its empty nothing there. I called support, they said sorry nothing they can do. I'm stuck. Please help
If you already completed the event once and collected the shards you won't be able to get a reward again. This is intended and not a bug.
If you missed shards as first-time rewards, PM me your ally code and I can have a look.