A Scroll of Protection, when used, prevents creatures of a certain type from entering a cylinder surrounding you or affecting you in that cylinder.
Using an action to read the scroll encloses you in a invisible barrier that extends from you to form a 5-foot-radius, 10-foot-high cylinder. For 5 minutes, this barrier prevents creatures of the specified type from entering or affecting anything within the cylinder.
Creatures of that type can try to overcome that protection:
A creature can attempt to overcome the barrier by using an action to make a DC 15 Charisma check. On a success, the creature ceases to be affected by the barrier.
From where can a creature attempt to overcome the barrier?
Right next to it? Within sight? On the same plane?