My permissions not working and if i write /pl pex is red.
Please help!

Code:
groups:
default:
options:
default: true
permissions:
- modifyworld.*
- chatex.allowchat
helper:
inheritance:
- default
options:
default: false
prefix: &l&2[Helper]&f&r
permissions:
- commandbook.fly
- commandbook.kick
- commandbook.tp
- commandbook.teleport
- commandbook.gamemode
builder:
inheritance:
- default
options:
default: false
prefix: &l&2[Builder]&f&r
permissions:
- commandbook.fly
- commandbook.tp
- commandbook.teleport
- commandbook.gamemode
- worldedit.*
admin:
inheritance:
- helper
options:
default: false
prefix: &l&4[Helper]&f&r
permissions:
- commandbook.ban
- commandbook.ipban
- commandbook.pardon
- commandbook.whitelist
- worldedit.*
owner:
options:
default: false
prefix: &l&1[Owner]&f&r
permissions:
- *
schema-version: 1

pex 1 is no longer supported.