Hello i am working on a meteor plugin and it works great . However, when the meteor falls, I would like a monster to appear. It works for basic monsters such as spider zombies... But my monster is an entity that I created and that works well when I use the egg on the server. There is no problem with this entity in game. The only problem is that I can't make it appear with commands like : loc.getWorld().spawnEntity(loc, EntityType.ACRONISS); I receive several error messages on my console when I want it to appear. Thank you for your answer.