New Members Unable to build in my server

I recently released my server, and some new people joined and said they can't build anywhere.

Code:

groups:
  default:
    default: true
    options:
      rank: '1000'
    permissions:
    - modifyworld.chat
  Commander:
    permissions:
    - '*.*'
    options:
      rank: '0'
    prefix: '&4[Commander]&8'
  Member:
    options:
      rank: '900'
    prefix: '&5[Member]&f'
    permissions:
    - modifyworld.*
    - -modifyworld.blocks.place.239
    - -modifyworld.blocks.place.237
    - -permissions.*
    - -factions.*
    - simplespawn.use.default
    - simplespawn.use
    - simplespawn.home.use
    - -simplespawn.jail.*
    - -simplespawn.release.*
  Officer:
    options:
      rank: '800'
    prefix: '&6[Officer]&f'
    permissions:
    - modifyworld.*
  Admin:
    options:
      rank: '100'
    prefix: '&0[Admin]&7'
    permissions:
    - modifyworld.*
    - permissions.*
    - factions.*
users:
  UndeadLegend:
    group:
    - Commander
    permissions:
    - '*.*'
  Cheda1233:
    group:
    - Officer
  xXNASHXx52:
    group:
    - Commander
    permissions:
    - '*.*'
  Creeperboy645:
    group:
    - Commander
    permissions:
    - '*.*'
 

this is my permissions file, if anyone can help i thank you in advance

 

try moving



- modifyworld.*
- -modifyworld.blocks.place.239
- -modifyworld.blocks.place.237

to default?

 

Builder:
default: false
permissions: []
inheritance:
- default
- g:essentials_builder
- g:towny_moderator
- g:bukkit_builder
info:
prefix: '&2[builder]'
build: true
suffix: ''

Your permissions seem to be unfinished, this is what it should look like if you are using Group Manager. You could add or remove the inheritance which takes permissions from the globalgroups.yml and add some permissions under the permissions section: Which will give players permissions for that world only.
If you are using Group Manager then you need to add the other parts of information otherwise it won't work. If you are not using Group Manager then yes do what the guy above said, Although i do recommend getting Group Manager as it is much easier to use, and a lot more people use it so if something goes wrong then it is easier to find help.
good luck.