[Server] Server thread/ERROR Plugin LagAssist v2.17.1 has fa

11.06 02:06:15 [Server] Server thread/INFO Enabling LagAssist v2.17.1
11.06 02:06:15 [Server] Server thread/INFO LagAssist » Enabling Systems:
11.06 02:06:15 [Server] Server thread/INFO [✔] Smart Mob Tools.
11.06 02:06:15 [Server] Server thread/INFO [✔] Hopper Manager.
11.06 02:06:15 [Server] Server thread/ERROR Plugin LagAssist v2.17.1 has failed to register events for class cx.sfy.LagAssist.stacker.StackManager because com/destroystokyo/paper/event/entity/PreCreatureSpawnEvent does not exist.
11.06 02:06:15 [Server] Server thread/ERROR Error occurred while enabling LagAssist v2.17.1 (Is it up to date?)
11.06 02:06:15 [Server] INFO java.lang.NoSuchMethodError: org.bukkit.entity.Entity.getChunk()Lorg/bukkit/Chunk;
11.06 02:06:15 [Server] INFO at cx.sfy.LagAssist.stacker.StackChunk.cleanSplit(StackChunk.java:262) ~[?:?]
11.06 02:06:15 [Server] INFO at cx.sfy.LagAssist.stacker.StackChunk.tryStacking(StackChunk.java:68) ~[?:?]
11.06 02:06:15 [Server] INFO at cx.sfy.LagAssist.stacker.StackChunk.loadChunk(StackChunk.java:238) ~[?:?]
11.06 02:06:15 [Server] INFO at cx.sfy.LagAssist.stacker.StackChunk.runStart(StackChunk.java:225) ~[?:?]
11.06 02:06:15 [Server] INFO at cx.sfy.LagAssist.stacker.StackManager.Enabler(StackManager.java:45) ~[?:?]
11.06 02:06:15 [Server] INFO at cx.sfy.LagAssist.Main.EnableClasses(Main.java:71) ~[?:?]
11.06 02:06:15 [Server] INFO at cx.sfy.LagAssist.Main.onEnable(Main.java:57) ~[?:?]
11.06 02:06:15 [Server] INFO at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[Spigot_Latest_1.14.1.jar:git-Spigot-03bd4b0-fcb9f90]
11.06 02:06:15 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:352) [Spigot_Latest_1.14.1.jar:git-Spigot-03bd4b0-fcb9f90]
11.06 02:06:15 [Server] INFO at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:416) [Spigot_Latest_1.14.1.jar:git-Spigot-03bd4b0-fcb9f90]
11.06 02:06:15 [Server] INFO at org.bukkit.craftbukkit.v1_14_R1.CraftServer.enablePlugin(CraftServer.java:458) [Spigot_Latest_1.14.1.jar:git-Spigot-03bd4b0-fcb9f90]
11.06 02:06:15 [Server] INFO at org.bukkit.craftbukkit.v1_14_R1.CraftServer.enablePlugins(CraftServer.java:372) [Spigot_Latest_1.14.1.jar:git-Spigot-03bd4b0-fcb9f90]
11.06 02:06:15 [Server] INFO at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:440) [Spigot_Latest_1.14.1.jar:git-Spigot-03bd4b0-fcb9f90]
11.06 02:06:15 [Server] INFO at net.minecraft.server.v1_14_R1.DedicatedServer.init(DedicatedServer.java:258) [Spigot_Latest_1.14.1.jar:git-Spigot-03bd4b0-fcb9f90]
11.06 02:06:15 [Server] INFO at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:761) [Spigot_Latest_1.14.1.jar:git-Spigot-03bd4b0-fcb9f90]
11.06 02:06:15 [Server] INFO at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171]