I turn off the permissions of the players from the permissions section. But when you open the admin permissions, players can also spawn mini.
Players can spawn mini without permission
This sounds like an issue with the way you have assigned permissions, not an issue with the Spawn Mini plugin.
WhiteThunder
This sounds like an issue with the way you have assigned permissions, not an issue with the Spawn Mini plugin.
Sorry. My english is bad.. [default] permissions are turned off. Only [admin] permissions are enabled. But players can spawn mini.
Could you show the result of the results of oxide.show group default and oxide.show perm spawnmini.mini commands?