i wanna try to use command /servers to show the server GUI but doesn't work
i do /portal create name:Servers triggerblock: water command:"!Servers"
and doesn't open the GUI how can i do?

ChestCommands conf:
######################
#+ +#

MENU SETTINGS

#+ +#
######################

menu-settings:

name - appears as the title - REQUIRED

name: '&2&lAbstractMc &a&lNetwork'

rows - the number of rows of the chest - REQUIRED

rows: 3

command - OPTIONAL (you can remove this or set it to '')

Bind multiple commands using ; (command: 'menu; m; me')

command: 'servers; server'

auto-refresh - OPTIONAL

How frequently the menu will be refreshed, in seconds.

Useful if you have variables in items' descriptions.

auto-refresh: 5

This command command will be execute when the menu is opened.

Supports all the icon command types.

open-action: 'sound: note pling;'

open-with-item - OPTIONAL

The menu will open only right-clicking with orange wool [35:1]

open-with-item:
id: 345
left-click: false
right-click: true

######################
#+ +#

ITEMS

#+ +#
######################

KitPvP:
COMMAND: 'server KitPvP'
NAME: '&cKitPvP'
LORE:
- '&7Clicca per entrare nel KitPvP!'
ID: 276
POSITION-X: 5
POSITION-Y: 2

ERROR AdvancedPortals:
[14:04:10 ERROR]: [AdvancedPortals] Portal command: !servers
[14:04:10 INFO]: [AdvancedPortals] Servers:null

Which version of the plugin are you using?

Well that version does not work with any command that teleports you or brings up a gui. The newer versions do however ;)

If you are using such an old version the version of mc you are using may become an issue however.