We are currently investigating issues some Epic users are having logging into the North American and European PC/Mac megaservers.
[BUG] Shadow Cloak & morphs can't be used with innocent NPCs targeted
The Nightblade skills Shadow Cloak, Shadowy Disguise, and Dark Cloak cannot be used or activated when an "innocent" NPC is under your targeting reticule if you have turned on Prevent Attacking Innocents in the Gameplay options.
@ZOS_GinaBruno @ZOS_JessicaFolsom @ZOS_BrianWheeler