如果还不行，告诉我你的服务器版本与IP我去看看

/manuadd 城管权限组 essentials.

Cat
Command
Perm
Description

                Moderatordeljailessentials.deljailAllow access to the /deljail command.
Moderatorjailsessentials.jailsAllow access to the /jails command.
Moderatorsetjailessentials.setjailAllow access to the /setjail command.
Moderatortogglejailessentials.jail.allow.<command>Allows essentials commands to be used while jailed (requires regular perm).
Moderatortogglejailessentials.jail.exemptPrevents a specified group or player from being jailed
Moderatortogglejailessentials.togglejailAllow access to the /togglejail command.
Moderatortogglejailessentials.togglejail.offlineAllows jailing of players who are offline.  This may allow you to jail exempt players.

Cat	Command	Perm	Description
Moderator	deljail	essentials.deljail	Allow access to the /deljail command.
Moderator	jails	essentials.jails	Allow access to the /jails command.
Moderator	setjail	essentials.setjail	Allow access to the /setjail command.
Moderator	togglejail	essentials.jail.allow.<command>	Allows essentials commands to be used while jailed (requires regular perm).
Moderator	togglejail	essentials.jail.exempt	Prevents a specified group or player from being jailed
Moderator	togglejail	essentials.togglejail	Allow access to the /togglejail command.
Moderator	togglejail	essentials.togglejail.offline	Allows jailing of players who are offline.  This may allow you to jail exempt players.

关监狱的是哪个……
也就是tjail的
需不需要其他的辅助权限

我早就试过了，不可能是essentials.tjail

/manuaddp 玩家 essentials.tjail

你们服务器没有ESS插件？

tjail是简称命令,原本的命令是togglejail;
用这个权限节点: essentials.togglejail
essentials.togglejail.offline  #这个是可以关不在线的玩家

我试试看，感谢了