[21:26:08 WARN]: org.bukkit.plugin.InvalidPluginException: java.lang.LinkageError: loader constraint violation: when resolving method "com.massivecraft.massivecore.xlib.gson.GsonBuilder.registerTypeAdapterFactory(Lcom/massivecraft/massivecore/xlib/gson/TypeAdapterFactory;)Lcom/massivecraft/massivecore/xlib/gson/GsonBuilder;" the class loader (instance of org/bukkit/plugin/java/PluginClassLoader) of the current class, com/massivecraft/massivecore/MassiveCore, and the class loader (instance of org/bukkit/plugin/java/PluginClassLoader) for the method's defining class, com/massivecraft/massivecore/xlib/gson/GsonBuilder, have different Class objects for the type com/massivecraft/massivecore/xlib/gson/TypeAdapterFactory used in the signature
[21:26:08 WARN]: at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135)
[21:26:08 WARN]: at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329)
[21:26:08 WARN]: at com.rylinaux.plugman.util.PluginUtil.load(PluginUtil.java:353)
[21:26:08 WARN]: at com.rylinaux.plugman.util.PluginUtil.load(PluginUtil.java:316)
[21:26:08 WARN]: at com.rylinaux.plugman.util.PluginUtil.reload(PluginUtil.java:377)
[21:26:08 WARN]: at com.rylinaux.plugman.command.ReloadCommand.execute(ReloadCommand.java:122)
[21:26:08 WARN]: at com.rylinaux.plugman.PlugManCommandHandler.onCommand(PlugManCommandHandler.java:95)
[21:26:08 WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[21:26:08 WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)
[21:26:08 WARN]: at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:640)
[21:26:08 WARN]: at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:626)
[21:26:08 WARN]: at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:411)
[21:26:08 WARN]: at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:375)
[21:26:08 WARN]: at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653)
[21:26:08 WARN]: at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556)
[21:26:08 WARN]: at java.lang.Thread.run(Thread.java:745)
[21:26:08 WARN]: Caused by: java.lang.LinkageError: loader constraint violation: when resolving method "com.massivecraft.massivecore.xlib.gson.GsonBuilder.registerTypeAdapterFactory(Lcom/massivecraft/massivecore/xlib/gson/TypeAdapterFactory;)Lcom/massivecraft/massivecore/xlib/gson/GsonBuilder;" the class loader (instance of org/bukkit/plugin/java/PluginClassLoader) of the current class, com/massivecraft/massivecore/MassiveCore, and the class loader (instance of org/bukkit/plugin/java/PluginClassLoader) for the method's defining class, com/massivecraft/massivecore/xlib/gson/GsonBuilder, have different Class objects for the type com/massivecraft/massivecore/xlib/gson/TypeAdapterFactory used in the signature
[21:26:08 WARN]: at com.massivecraft.massivecore.MassiveCore.getMassiveCoreGsonBuilder(MassiveCore.java:130)
[21:26:08 WARN]: at com.massivecraft.massivecore.MassiveCore.<clinit>(MassiveCore.java:95)
[21:26:08 WARN]: at java.lang.Class.forName0(Native Method)
[21:26:08 WARN]: at java.lang.Class.forName(Class.java:348)
[21:26:08 WARN]: at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64)
[21:26:08 WARN]: at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131)
[21:26:08 WARN]: ... 15 more