Variable Triggers Error when using Spigot 1.5+ (Also libigot

30.04 02:47:55 [Server] SEVERE at java.lang.Thread.run(Unknown Source)
30.04 02:47:55 [Server] SEVERE at com.wizardscraft.scripting.ScriptInterpreter.run(ScriptInterpreter.java:260)
30.04 02:47:55 [Server] SEVERE at com.wizardscraft.scripting.ScriptInterpreter.Interpret(ScriptInterpreter.java:337)
30.04 02:47:55 [Server] SEVERE at com.wizardscraft.scripting.ScriptInterpreter.Interpret(ScriptInterpreter.java:1897)
30.04 02:47:55 [Server] SEVERE at org.bukkit.craftbukkit.CraftWorld.spawnEntity(CraftWorld.java:469)
30.04 02:47:55 [Server] SEVERE at org.bukkit.craftbukkit.CraftWorld.spawn(CraftWorld.java:922)
30.04 02:47:55 [Server] SEVERE at org.bukkit.craftbukkit.CraftWorld.spawn(CraftWorld.java:1148)
30.04 02:47:55 [Server] SEVERE at net.minecraft.server.World.addEntity(World.java:925)
30.04 02:47:55 [Server] SEVERE java.lang.IllegalStateException: Asynchronous entity add!
30.04 02:47:54 [Server] SEVERE Exception in thread "Thread-29"