EDIT (07 Dec 18, 14:15 UTC): We believe we have now solved this issue and all players should be able to revenge raid as intended. If you are still experiencing this issue, please submit a new support request!

Status (07 Dec 18, 13:15 UTC): We are currently investigating this issue here and hope to get it resolved as soon as possible.

Thank you for your patience while we are investigating this issue here.