[2020] DLCs says to Activate even though it shows as "Owned" (Anno 1800 Deluxe Edition)

Hello Ubisoft and fellow Anno-nians,

I own the Deluxe Edition of Anno 1800, (purchased from Ubisoft Store) but when I click on any of the icons of DLCs in the "Additional Content" section, all of the DLCs show as "owned" but also says "ACTIVATE DLC",

I had already purchased the Deluxe Edition of Anno 1800, Where can I get the Key to Activate any/all of my DLCs?

Thanking you,