Change y to z for start-pos config

BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/config/typeserializer/Vector2iTypeSerializer.java

@@ -15,6 +15,8 @@ public class Vector2iTypeSerializer implements TypeSerializer<Vector2i> {
         var xNode = node.node("x");
         var yNode = node.node("y");
 
+        if (yNode.virtual()) yNode = node.node("z"); // fallback to z if y is not present
+
         if (xNode.virtual() || yNode.virtual()) throw new SerializationException("Cannot parse Vector2i: value x or y missing");
 
         return Vector2i.from(

BlueMapCommon/src/main/resources/de/bluecolored/bluemap/config/maps/map.conf

@@ -22,7 +22,7 @@ sorting: ${sorting}
 # The position on the world where the map will be centered if you open it.
 # You can change this at any time.
 # This defaults to the world-spawn if you don't set it.
-#start-pos: {x:500, y:-820}
+#start-pos: {x:500, z:-820}
 
 # The color of thy sky as a hex-color
 # You can change this at any time.