Hỏi đáp Các bác chỉ em fix lỗi plugin DragonTravel với ạ

[17:54:15 INFO]: [DragonTravel] Loading DragonTravel v01.008.02
[17:54:15 INFO]: [DragonTravel] [Error] Could not register the RyeDragon-entity!
[17:54:15 WARN]: java.lang.RuntimeException: Unable to override the old entity RegistryMaterials

[17:54:15 WARN]: at eu.phiwa.dragontravel.nms.v1_12_R1.CustomEntityRegistry.getInstance(CustomEntityRegistry.java:55)

[17:54:15 WARN]: at eu.phiwa.dragontravel.nms.v1_12_R1.CustomEntityRegistry.registerCustomEntity(CustomEntityRegistry.java:62)

[17:54:15 WARN]: at eu.phiwa.dragontravel.nms.v1_12_R1.EntityRegister.registerEntity(EntityRegister.java:12)

[17:54:15 WARN]: at eu.phiwa.dragontravel.core.DragonTravel.onLoad(DragonTravel.java:118)

[17:54:15 WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:303)

[17:54:15 WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.reload(CraftServer.java:743)

[17:54:15 WARN]: at org.bukkit.Bukkit.reload(Bukkit.java:525)

[17:54:15 WARN]: at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25)

[17:54:15 WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)

[17:54:15 WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:641)

[17:54:15 WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchServerCommand(CraftServer.java:627)

[17:54:15 WARN]: at net.minecraft.server.v1_12_R1.DedicatedServer.aP(DedicatedServer.java:443)

[17:54:15 WARN]: at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406)

[17:54:15 WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:678)

[17:54:15 WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:576)

[17:54:15 WARN]: at java.base/java.lang.Thread.run(Thread.java:831)

[17:54:15 WARN]: Caused by: java.lang.NoSuchFieldException: modifiers

[17:54:15 WARN]: at java.base/java.lang.Class.getDeclaredField(Class.java:2549)

[17:54:15 WARN]: at eu.phiwa.dragontravel.nms.v1_12_R1.CustomEntityRegistry.getInstance(CustomEntityRegistry.java:47)

[17:54:15 WARN]: ... 15 more