Challenge Mode is missing from The Division today.
Ubisoft has announced that it's aware of the missing Challenge Mode from The Division, promising its return tomorrow.
"While we won’t be able to fix it today, we can confirm that it will be back tomorrow," the developer wrote on the official Twitter account.
We are aware of the missing Daily Challenge mode. While we won’t be able to fix it today, we can confirm that it will be back tomorrow
— The Division (@TheDivisionGame) April 13, 2016
This could have something to do with the recently discovered glitch that allowed players to get multiple High-End drops from killing named enemies in Challenge Mode.
Although this bug was fixed with a hotfix released yesterday, the developer could've identified another issue that required taking Challenge Mode down.