There are invincible monsters within the range of the altar, preventing me from starting the ritual.

On the corridor map, there are humanoid stone statues. Before we open the central stone coffin, they are in an invincible state and cannot be targeted. After we open the coffin, they activate and can be killed. However, within this area there is an altar, and several statues have not been activated, which keeps them in an invincible state. They have already been designated by the altar as the monsters to be killed before activation, but now I cannot kill them, and the altar cannot be activated either.