Paper bug

[02:26:10 INFO]: Data value allowed items: 
[02:26:10 WARN]: java.lang.NoSuchFieldException: modifiers

[02:26:10 WARN]:        at java.base/java.lang.Class.getDeclaredField(Class.java:2610)

[02:26:10 WARN]:        at org.github.paperspigot.PaperSpigotConfig.stackableBuckets(PaperSpigotConfig.java:192)

[02:26:10 WARN]:        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

[02:26:10 WARN]:        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)

[02:26:10 WARN]:        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

[02:26:10 WARN]:        at java.base/java.lang.reflect.Method.invoke(Method.java:568)

[02:26:10 WARN]:        at org.github.paperspigot.PaperSpigotConfig.readConfig(PaperSpigotConfig.java:84)

[02:26:10 WARN]:        at org.github.paperspigot.PaperSpigotConfig.init(PaperSpigotConfig.java:62)

[02:26:10 WARN]:        at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:181)

[02:26:10 WARN]:        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:563)

[02:26:10 WARN]:        at java.base/java.lang.Thread.run(Thread.java:833)