Hỏi đáp lỗi UltimateStacker

[09:15:37] [Server thread/ERROR]: Unexpected error while loading UltimateStacker v1.11.20 c2.3.44: Disabling plugin!
java.lang.NoSuchFieldError: STRAY
at com.songoda.ultimatestacker.lootables.LootablesManager.createDefaultLootables(LootablesManager.java:482) ~[UltimateStacker-1.11.20.jar:?]
at com.songoda.ultimatestacker.UltimateStacker.onPluginEnable(UltimateStacker.java:124) ~[UltimateStacker-1.11.20.jar:?]
at com.songoda.ultimatestacker.core.SongodaPlugin.onEnable(SongodaPlugin.java:97) [UltimateStacker-1.11.20.jar:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:292) [Spigot.jar:git-Spigot-72c2605-251a5b6]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) [Spigot.jar:git-Spigot-72c2605-251a5b6]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [Spigot.jar:git-Spigot-72c2605-251a5b6]
at org.bukkit.craftbukkit.v1_10_R1.CraftServer.enablePlugin(CraftServer.java:373) [Spigot.jar:git-Spigot-72c2605-251a5b6]
at org.bukkit.craftbukkit.v1_10_R1.CraftServer.enablePlugins(CraftServer.java:323) [Spigot.jar:git-Spigot-72c2605-251a5b6]
at net.minecraft.server.v1_10_R1.MinecraftServer.t(MinecraftServer.java:412) [Spigot.jar:git-Spigot-72c2605-251a5b6]
at net.minecraft.server.v1_10_R1.MinecraftServer.l(MinecraftServer.java:377) [Spigot.jar:git-Spigot-72c2605-251a5b6]
at net.minecraft.server.v1_10_R1.MinecraftServer.a(MinecraftServer.java:332) [Spigot.jar:git-Spigot-72c2605-251a5b6]
at net.minecraft.server.v1_10_R1.DedicatedServer.init(DedicatedServer.java:271) [Spigot.jar:git-Spigot-72c2605-251a5b6]
at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:535) [Spigot.jar:git-Spigot-72c2605-251a5b6]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_261]
[09:15:37] [Server thread/INFO]: [UltimateStacker] Disabling UltimateStacker v1.11.20

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