When loading ProtocolLib, it "Cannot load server and client packet list"
It then shows the following exception has occurred:
com.comphenix.protocol.reflect.FieldAccessException: No field with type java.util.Map exists in class EnumProtocol. at com.comphenix.protocol.reflect.StructureModifier.readInternal(StructureModifier.java:216) ~[ProtocolLib%20(1).jar:4.4.0-b421] at com.comphenix.protocol.reflect.StructureModifier.read(StructureModifier.java:195) ~[ProtocolLib%20(1).jar:4.4.0-b421] at com.comphenix.protocol.injector.netty.NettyProtocolRegistry.initialize(NettyProtocolRegistry.java:57) ~[ProtocolLib%20(1).jar:4.4.0-b421] at com.comphenix.protocol.injector.netty.ProtocolRegistry.<init>(ProtocolRegistry.java:59) ~[ProtocolLib%20(1).jar:4.4.0-b421] at com.comphenix.protocol.injector.netty.NettyProtocolRegistry.<init>(NettyProtocolRegistry.java:38) ~[ProtocolLib%20(1).jar:4.4.0-b421] at com.comphenix.protocol.injector.packet.PacketRegistry.initialize(PacketRegistry.java:70) ~[ProtocolLib%20(1).jar:4.4.0-b421] at com.comphenix.protocol.injector.packet.PacketRegistry.getClientPacketTypes(PacketRegistry.java:198) ~[ProtocolLib%20(1).jar:4.4.0-b421] at com.comphenix.protocol.injector.PacketFilterManager.<init>(PacketFilterManager.java:266) [ProtocolLib%20(1).jar:4.4.0-b421] at com.comphenix.protocol.injector.PacketFilterBuilder.buildInternal(PacketFilterBuilder.java:250) [ProtocolLib%20(1).jar:4.4.0-b421] at com.comphenix.protocol.injector.PacketFilterBuilder.build(PacketFilterBuilder.java:233) [ProtocolLib%20(1).jar:4.4.0-b421] at com.comphenix.protocol.ProtocolLib.onLoad(ProtocolLib.java:213) [ProtocolLib%20(1).jar:4.4.0-b421] at org.bukkit.craftbukkit.v1_15_R1.CraftServer.loadPlugins(CraftServer.java:356) [spigot-1.15.jar:git-Spigot-047b6f8-61d4b09] at net.minecraft.server.v1_15_R1.DedicatedServer.init(DedicatedServer.java:202) [spigot-1.15.jar:git-Spigot-047b6f8-61d4b09] at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:783) [spigot-1.15.jar:git-Spigot-047b6f8-61d4b09] at java.lang.Thread.run(Unknown Source) [?:1.8.0_211] [10:49:02] [Server thread/WARN]: [ProtocolLib] Failed to register command PACKET: java.lang.ExceptionInInitializerError

To Reproduce
Steps to reproduce the behavior:

1. Download Paper 1.15 Jar.
2. Start Paper server with ProtocolLib.Jar in the plugins folder.
3. See error

Screenshots

Make sure you're using the latest dev build: http://ci.dmulloy2.net/job/ProtocolLib/

That fixed it! Thanks!