permissions.yml not working

groups:
  default:
    options:
      default: true
    permissions:
    - modifyworld.*

   Iron:
     options:
       inheritance: - default
       prefix: '§0[§fIron§0]§f'
   Redstone:
     permissions:

     options:
       inheritance:
         - Iron
       prefix: '§0[§fRedstone§0]§f'

   Bedrock:
     permissions:

     options:

   Admin:
     options:

     permissions:


     options:
       prefix: '[Admin]'
     permissions:
      - essentials.*

schema-version: 1
users:
  cfeabf65-41f8-4d07-9dd7-c45b75eabf5c:
    group:
    - Admin
    options:
      name: AceKijani