[19:22:08 WARN]: [ChatManager] Task #338 for ChatManager v3.0.1 generated an exception
java.lang.NoSuchMethodError: org.bukkit.scheduler.BukkitScheduler.cancelAllTasks()V
	at me.H1DD3NxN1NJA.ChatManager.Main$1.run(Main.java:277) ~[?:?]
	at org.bukkit.craftbukkit.v1_13_R2.scheduler.CraftTask.run(CraftTask.java:76) ~[server.jar:git-Spigot-0ede7d0-ee5efeb]
	at org.bukkit.craftbukkit.v1_13_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:361) [server.jar:git-Spigot-0ede7d0-ee5efeb]
	at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:889) [server.jar:git-Spigot-0ede7d0-ee5efeb]
	at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:411) [server.jar:git-Spigot-0ede7d0-ee5efeb]
	at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:831) [server.jar:git-Spigot-0ede7d0-ee5efeb]
	at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:729) [server.jar:git-Spigot-0ede7d0-ee5efeb]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]