Do you skip an eliminated player’s turn with Altar of the Loa if all they have left in play is a fort?
No. That player will count toward the endgame condition because they can’t give move actions, but assuming there are enough other players still going to prevent that, the player with the fort still gets their turn in the normal sequence. If there’s nothing within range of the fort to attack they won’t have anything to do, but that’s not enough to skip them entirely.
Can it skip that player if they didn’t have a fort? (absolutely no units in play)