Title. 
There is no such thing as Is In Enemy Spawn Room. I can only see Is In Spawn Room which does not work.
The command detects if the player is in his team’s spawn, which in this case is not true
If it is on a singular map, you could make it so if the player passes the door of the spawn or is in spawn with vectors, but if not I hardly see a solution, one other way would be to, if it’s not a 6v6 teleport a player of the opposite team on the position of the player and check if they are in the spawn, but like I said it would require that it’s not a 6v6 since you need to teleport it constantly.
Its not possible to enter enemy spawnrooms. I have not tried it myself yet but the only way to get into the enemies spawn room is probably to get teleported there. As you need to execute the action yourself in your custom script to teleport, you can just add the “set status: phased out” action just before the player gets teleported.