Parkour error

> [19:16:00 INFO]: Diamond_Cat issued server command: /parkour cmds
> [19:16:00 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'parkour' in plugin Parkour v4.5
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[patched_1.12.2.jar:git-Paper-1393]
at us.Myles.PWP.FakeSimpleCommandMap.dispatch(FakeSimpleCommandMap.java:95) ~[?:?]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:685) ~[patched_1.12.2.jar:git-Paper-1393]
at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1472) ~[patched_1.12.2.jar:git-Paper-1393]
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1277) ~[patched_1.12.2.jar:git-Paper-1393]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) ~[patched_1.12.2.jar:git-Paper-1393]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:5) ~[patched_1.12.2.jar:git-Paper-1393]
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14) ~[patched_1.12.2.jar:git-Paper-1393]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_161]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_161]
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [patched_1.12.2.jar:git-Paper-1393]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:843) [patched_1.12.2.jar:git-Paper-1393]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:427) [patched_1.12.2.jar:git-Paper-1393]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:767) [patched_1.12.2.jar:git-Paper-1393]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:665) [patched_1.12.2.jar:git-Paper-1393]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
Caused by: java.lang.IllegalStateException: zip file closed
at java.util.zip.ZipFile.ensureOpen(ZipFile.java:686) ~[?:1.8.0_161]
at java.util.zip.ZipFile.getEntry(ZipFile.java:315) ~[?:1.8.0_161]
at java.util.jar.JarFile.getEntry(JarFile.java:240) ~[?:1.8.0_161]
at java.util.jar.JarFile.getJarEntry(JarFile.java:223) ~[?:1.8.0_161]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:120) ~[patched_1.12.2.jar:git-Paper-1393]
at org.bukkit.plugin.java.JavaPluginLoader.getClassByName(JavaPluginLoader.java:189) ~[patched_1.12.2.jar:git-Paper-1393]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:115) ~[patched_1.12.2.jar:git-Paper-1393]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:104) ~[patched_1.12.2.jar:git-Paper-1393]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_161]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_161]
at me.A5H73Y.Parkour.ParkourCommands.onCommand(ParkourCommands.java:412) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[patched_1.12.2.jar:git-Paper-1393]
... 15 more