diff --git a/src/game/engine/src/generation/map_placer.gd b/src/game/engine/src/generation/map_placer.gd
index 48b16707..98b5d089 100644
--- a/src/game/engine/src/generation/map_placer.gd
+++ b/src/game/engine/src/generation/map_placer.gd
@@ -131,7 +131,9 @@ func place_resources(game_map: RefCounted, multiplier: float) -> void:
 		var res_id: String = res.get("id", "")
 		var valid_terrains: Array = res.get("terrains", [])
 		var climate_zones: Array = res.get("climate_zones", [])
-		var affinity: String = res.get("school_affinity", "")
+		var affinity: String = ""
+		if res.has("school_affinity") and res["school_affinity"] != null:
+			affinity = str(res["school_affinity"])
 		eligible[res_id] = []
 		eligible_weights[res_id] = PackedFloat32Array()
 		for axial: Vector2i in game_map.tiles:
@@ -186,7 +188,9 @@ func place_resources(game_map: RefCounted, multiplier: float) -> void:
 		if candidates.is_empty():
 			continue
 
-		var cand_weights_arr: Array[float] = Array(cand_weights, TYPE_FLOAT, "", null)
+		var cand_weights_arr: Array[float] = []
+		for w: float in cand_weights:
+			cand_weights_arr.append(w)
 		var tile_idx: int = _weighted_random_index(cand_weights_arr)
 		if tile_idx < 0:
 			tile_idx = _rng.randi_range(0, candidates.size() - 1)