Ive been playing and enjoying dalaran heist since it came out and have been playing it near daily. Today I haven’t been able to load it or any other solo adventure mode.
Im playing mobile on a Samsung s8 active. Dont know if its relevant, but I was in the middle of a game when I suspended play yesterday.
Edit: I feel I should say how its not loading. Whenever I hit the start button it just says “loading” seemingly indefinitely