Error in CruelDragon ¿ Fixed?

[Mukai]

Hello , please helpme to fix this error?

18:10:52:Exception] while TSpiderHouseMonster.Run :3
18:10:53:Exception] while TSpiderHouseMonster.Run :3
18:10:57:Exception] while TSpiderHouseMonster.Run :3
18:11:12:Exception] while TSpiderHouseMonster.Run :3
18:11:14:Exception] while TSpiderHouseMonster.Run :3
18:11:48:Exception] while TSpiderHouseMonster.Run :3
18:11:52:Exception] while TSpiderHouseMonster.Run :3
18:11:53:Exception] while TSpiderHouseMonster.Run :3

etc etc