Hey there. The quest was likely deleted on that character at some point. Normally those deleted quests go to the quest kiosk, however there’s a bit of a bug with this one. The current workaround is to try and pick up the quest with a different character. If none of your characters can pick up the quest, you’ll either have to wait until the issue is fixed or delete and remake one of your current characters (which I am not advising to do, but merely letting you know that this is the workaround).