Released on April 18 2019. It affects the following platforms: PC, Mac, PS4, Xbox.
This afternoon, we’ll be performing a hotfix on all platforms and megaservers that will allow you to obtain an Anniversary Jubilee Gift Box from Cyrodiil Board Quests (these consist of “Kill 20...” quests, Scouting quests, and Capture quests). We’ll let you know as soon as this hotfix is complete; it will not require any downtime.
Update: Hotfix is complete, and you will now receive Gift Boxes from completing the daily quests mentioned above.