Permissionsex is not saving user data for some reason. No matter what I do, pex does not save users in the permissions.yml .It's just blank at the bottom. I tried turning on CreateUserRecords, but that doesn't help. Here's my config. I'm on spigot 1.11 and i'm using the latest pex.

multiserver:
use-netevents: true
permissions:
debug: false
allowOps: false
user-add-groups-last: false
log-players: false
createUserRecords: true
backend: file
informplayers:
changes: false
basedir: plugins/PermissionsEx
backends:
file:
type: file
file: permissions.yml
updater: true
alwaysUpdate: false

I would bet on the server being run in offline mode, which is not supported by PEX.