runTaskTimer = UnsupportedOperationException

Hello fellow devs !

I'm trying to run a repeating task and to end it when I need it.
I'll start by saying I'm using scheduleAsyncRepeatingTask because runTaskTimer doesn't work for me (I did extended BukkitRunnable), I can't seem to set the taskId correct.
here's the error "runTaskTimer" itself gives me (I gave it a full line and it proved me it was "runTaskTimer"):

PHP:

[08:11:25] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'vanish' in plugin City v1
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[spigot.jar:git-Spigot-f39a89e-4633e6c]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[spigot.jar:git-Spigot-f39a89e-4633e6c]
        at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchCommand(CraftServer.java:711) ~[spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.PlayerConnection.handleCommand(PlayerConnection.java:1657) ~[spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.PlayerConnection.a(PlayerConnection.java:1497) ~[spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.PacketPlayInChat.a(PacketPlayInChat.java:47) ~[spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) ~[spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:19) ~[spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.TickTask.run(SourceFile:18) [spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeTask(SourceFile:144) [spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) [spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeNext(SourceFile:118) [spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.MinecraftServer.aZ(MinecraftServer.java:917) [spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.MinecraftServer.executeNext(MinecraftServer.java:910) [spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(SourceFile:127) [spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.MinecraftServer.sleepForTick(MinecraftServer.java:894) [spigot.jar:git-Spigot-f39a89e-4633e6c]
        at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:827) [spigot.jar:git-Spigot-f39a89e-4633e6c]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_201]
Caused by: java.lang.UnsupportedOperationException: Use BukkitRunnable#runTaskTimer(Plugin, long, long)
        at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftScheduler.runTaskTimer(CraftScheduler.java:533) ~[spigot.jar:git-Spigot-f39a89e-4633e6c]
        at second.barmsg.barmsg(barmsg.java:28) ~[?:?]
        at main.First.vanish(First.java:1091) ~[?:?]
        at main.First.onCommand(First.java:673) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[spigot.jar:git-Spigot-f39a89e-4633e6c]
        ... 17 more

If you know any other way to cancel the repeating task is good, if you know what's wrong with the runTaskTimer, also works.
Thanks in advance

 

Hello, so to create a runtasktimer you will need to create a new BukkitRunnable. Just like this

Code:

new BukkitRunnable() {

    @Override
    public void run() {
        //Your code  
    }
          
}.runTaskTimer(this, 20, 20);

You can create task with a BukkitRunnable like the code before. Or a Runnable like you did but instead of "
new BukkitRunnable()" you will have to put "new Runnable()"