[17:35:29] [Server thread/INFO] [net.minecraft.network.NetHandlerPlayServer]: xingxiu issued server command: /p h
[17:35:30] [Netty Server IO #2/WARN] [FML]: Try to asynchronously call InventoryOpenEvent, caught!
[17:35:30] [Netty Server IO #2/WARN] [FML]: Try to asynchronously call InventoryOpenEvent, caught!
[17:35:31] [Netty Server IO #2/WARN] [FML]: Try to asynchronously call InventoryOpenEvent, caught!
[17:35:31] [Netty Server IO #2/WARN] [FML]: Try to asynchronously call InventoryOpenEvent, caught!
每次输入指令都会提示

FML
是什么插件？另外指令生效了吗

没有fml插件= = 指令是生效的，就是玩家只要输入指令就会提示这个

后台的报错吧，检查插件配置是否有问题。