I was playing MTG Duels.
I had Jace, Telepath Unbound on the battlefield and activated its second ability:
You may cast target instant or sorcery card from your graveyard this turn. If that card would be put into your graveyard this turn, exile it instead.
The target was Adverse Conditions in the graveyard. However, there was no effect and it wasn't exiled either.
Why was there no effect?