12:11:12] [Server thread/ERROR]: Could not pass event PlayerTeleportEvent to HorseTpWithMe v1.2.7
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:478) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:469) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.EntityPlayer.mount(EntityPlayer.java:598) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.EntityHorse.i(EntityHorse.java:665) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.EntityHorse.a(EntityHorse.java:650) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.EntityInsentient.e(EntityInsentient.java:812) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.EntityHuman.u(EntityHuman.java:913) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:1323) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.PacketPlayInUseEntity.a(SourceFile:52) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.PacketPlayInUseEntity.a(SourceFile:11) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_79]
	at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_79]
	at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:710) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	at java.lang.Thread.run(Thread.java:745) [?:1.7.0_79]
Caused by: java.lang.NoSuchMethodError: java.util.HashMap.remove(Ljava/lang/Object;Ljava/lang/Object;)Z
	at me.TheMrJezza.HorseTpWithMe.playerTeleport(HorseTpWithMe.java:113) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor471.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_79]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_79]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[minecraft_server.jar:git-Spigot-1d14d5f-ba32592]
	... 22 more