[HELP] NoClassDefFound on MythicMobs

It's been like days i'm being messaged with this error. And I tried milllions of times, can't make it work.

Spoiler: Error.log

Code (Text):

16:29:00 ERROR]: Could not pass event PlayerInteractEntityEvent to AutoRide v1.5.1
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:500) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:485) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1580) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at net.minecraft.server.v1_12_R1.PacketPlayInUseEntity.a(SourceFile:69) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at net.minecraft.server.v1_12_R1.PacketPlayInUseEntity.a(SourceFile:13) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_171]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_171]
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot.jar:git-Spigot-2086bb0-8cc5a7e]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_171]
Caused by: java.lang.NoClassDefFoundError: io/lumine/xikage/mythicmobs/MythicMobs
at com.gmail.JyckoSianjaya.AutoRide.Ride.RightClick(Ride.java:166) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_171]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_171]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_171]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_171]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot.jar:git-Spigot-2086bb0-8cc5a7e]
... 15 more

And here is the line 166:

Code (Java):

                    MobManager mythic = MythicMobs.inst().getMobManager();
 

While the code:

Spoiler: The Code

Code (Java):

public void onClick(PlayerInteractEntityEvent event) {
                if (mera = true) {
                    if (mmride = true) {
                        try {
                    MobManager mythic = MythicMobs.inst().getMobManager();
                        if (mythic.getAllMythicEntities().contains(b)) {  
                        sendActionBar(player, mmfail);
                        return;
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                        sendConsole("AutoRide > An error has occured, do you have mythicmobs plugin?");
                    }
                    }
                }

        Boolean mmride = config.getBoolean("disable-mythicmobs-ride");
    Boolean mera = Bukkit.getServer().getPluginManager().isPluginEnabled("MythicMobs");
// This code has been shortened.
 

If you need to know anything, feel free to ask.
Every single help is appreciated

 

Yes I do.
Here it is:

Spoiler: config.yml

Code (Text):

name: AutoRide
version: 1.5.1
author: Gober
description: Ride any entity if you have its permission
main: com.gmail.JyckoSianjaya.AutoRide.Ride
softdepend: [WorldGuard,MythicMobs,Citizens]
commands:
      ride:
        usage: /<command>
        description: Retoggle riding on or off.

 

*(Bumperino)*

Still not yet solved.

 

I do want to make MythicMobs as a softdepend. (Optional)
But it doesn't work although I've tried to catch the error.

 

Oh yahh! Forgot these! xD! Thanks alot!
Thread closed.