Pex not working

This is my pex file:


groups:
Default:
permissions:
- essentials.spawn
- essentials.rules
- essentials.list
- essentials.helpop
- essentials.help
- essentials.help
prefix: '&f[Guest]'
options:
build: false
rank: '1000'
Member:
default: true
permissions:
- essentials.afk
- essentials.sethome
- essentials.home
- essentials.tpa
- essentials.tpaccept
inheritance:
- default
prefix: '&e[Member]&f'
options:
build: false
rank: '500'
Vip:
permissions:
- essentials.hat
- essentials.more
- essentials.nick
- essentials.repair.all
- essentials.workbench
inheritance:
- Member
prefix: '&b[Vip]'
options:
build: false
rank: '200'
Staff:
permissions:
- essentials.fly
- essentials.feed
- essentials.workbench
- essentials.helpop.receive
- essentials.tempban
- essentials.tempban.exempt
- essentials.ban.exempt
- essentials.kick
- essentials.kick.exempt
- essentials.mute
- essentials.mute.exempt
- essentials.enderchest
- essentials.enderchest.others
- essentials.enderchest.modify
- essentials.insee
- essentials.insee.modify
inheritance:
- Vip
prefix: '&c[Staff]&f'
options:
build: true
rank: '100'
Owner:
permissions:
-'*'
prefix: '&7[Owner]&7'
options:
build: true
rank: '0'
users:
user:
group:
- Owner
user:
group:
- Owner




And when i started my server in the consol it said there was an error with Premissionsex. Would someone please tell me whats wrong