Redo all the lines that are indented (make them not indented), then indent them again.
It gives me this error
16:56:41 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'sk' in plugin Skript v2.1.2
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[MZombie.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[MZombie.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) ~[MZombie.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1162) [MZombie.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:997) [MZombie.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [MZombie.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [MZombie.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [MZombie.jar:git-Spigot-db6de12-18fbb24]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_131]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_131]
at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [MZombie.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [MZombie.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [MZombie.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [MZombie.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [MZombie.jar:git-Spigot-db6de12-18fbb24]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
Caused by: java.lang.NoSuchMethodError: ch.njol.util.Pair.getFirst()Ljava/lang/Object;
at com.pie.tlatoani.Mundo$41.parse(Mundo.java:965) ~[?:?]
at ch.njol.skript.registrations.Classes.parseSimple(Classes.java:398) ~[?:?]
at ch.njol.skript.registrations.Classes.parse(Classes.java:427) ~[?:?]
at ch.njol.skript.lang.UnparsedLiteral.getConvertedExpression(UnparsedLiteral.java:97) ~[?:?]
at ch.njol.skript.lang.UnparsedLiteral.getConvertedExpression(UnparsedLiteral.java:86) ~[?:?]
at ch.njol.skript.lang.UnparsedLiteral.getConvertedExpression(UnparsedLiteral.java:1) ~[?:?]
at ch.njol.skript.conditions.CondCompare.init(CondCompare.java:174) ~[?:?]
at ch.njol.skript.conditions.CondCompare.init(CondCompare.java:126) ~[?:?]
at ch.njol.skript.lang.SkriptParser.parse(SkriptParser.java:237) ~[?:?]
at ch.njol.skript.lang.SkriptParser.parse(SkriptParser.java:164) ~[?:?]
at ch.njol.skript.lang.Condition.parse(Condition.java:80) ~[?:?]
at ch.njol.skript.ScriptLoader.loadItems(ScriptLoader.java:694) ~[?:?]
at ch.njol.skript.command.Commands.loadCommand(Commands.java:449) ~[?:?]
at ch.njol.skript.ScriptLoader.loadScript(ScriptLoader.java:462) ~[?:?]
at ch.njol.skript.ScriptLoader.loadScripts(ScriptLoader.java:262) ~[?:?]
at ch.njol.skript.SkriptCommand.onCommand(SkriptCommand.java:155) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[MZombie.jar:git-Spigot-db6de12-18fbb24]
... 15 more
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