Error charging plugin...

Hey i have error on charging my plugin please who can help me?

Code:

[22:39:54 ERROR]: Could not load 'plugins\Plugin01.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: org/bstats/bukkit/Metrics$CustomChart
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:327) ~[Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:248) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:305) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.reload(CraftServer.java:750) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.Bukkit.reload(Bukkit.java:525) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:27) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchServerCommand(CraftServer.java:634) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.DedicatedServer.aP(DedicatedServer.java:444) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:407) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [Server.jar:git-Spigot-dcd1643-e60fc34]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_241]
Caused by: java.lang.NoClassDefFoundError: org/bstats/bukkit/Metrics$CustomChart
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_241]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_241]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:78) ~[Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[Server.jar:git-Spigot-dcd1643-e60fc34]
        ... 14 more
Caused by: java.lang.ClassNotFoundException: org.bstats.bukkit.Metrics$CustomChart
        at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_241]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:152) ~[Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:100) ~[Server.jar:git-Spigot-dcd1643-e60fc34]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_241]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_241]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_241]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_241]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:78) ~[Server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[Server.jar:git-Spigot-dcd1643-e60fc34]
        ... 14 more

 

Looks like multiple plugins use a class with the same package+name, and one of them is trying to use the class from the other.