com.onarandombox.MultiverseCore.MultiverseCore.onCommand(MultiverseCore.java:897)
[12:55:45] [Server thread/WARN]:         at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[12:55:45] [Server thread/WARN]:         at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)
[12:55:45] [Server thread/WARN]:         at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:642)
[12:55:45] [Server thread/WARN]:         at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:628)
[12:55:45] [Server thread/WARN]:         at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:404)
[12:55:45] [Server thread/WARN]:         at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:368)
[12:55:45] [Server thread/WARN]:         at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:657)
[12:55:45] [Server thread/WARN]:         at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:560)
[12:55:45] [Server thread/WARN]:         at java.lang.Thread.run(Unknown Source)
[12:55:45] [Server thread/INFO]: An internal error occurred when attempting to perform this command.
[12:55:45] [Server thread/INFO]: Details were printed to the server console and logs, please add that to your bug report.

崩溃报告不完善，无法解释