I’ve been having this issue since last night. Every time I try to revive a KO’d hero from the breaker quest, it just does nothing when I click. Anyone else having this issue? I’ve restarted the game multiple times but it keeps glitching and I can’t continue the breaker quest because of this.
Try changing the filter on the left side of the screen from “All” to “K.O.'d”. This is a known bug that’s been around for months; I think it’s appearing more frequently now, though.