This season 7 week 1 epic quest requires you too buy a shield potion from a mending machine.

In season 7 there are vending machines around the map where you can buy weapons and items. You can buy shield potions from mending machines. If you find a mending machine that sells a shield potion make sure you buy one and this quest will be yours.

I got this quest in Catty Corner. The gas station there has a mending machine that sells shield potions.

Here is a map of all the mending machine locations.

Map credit to fortnite.gg