Root tekkit folder/Plugins/permissionsEX/permissions.yml
PermissionsEX is a plugin not a mod.
@vdub, Your yml coding isnt right. causing to break down, make sure you dont have any tabs in it and make sure your alignment is correct.
You can check that here: http://yaml-online-parser.appspot.com/
if you make it correct it should look like this:
groups:
default:
default: true
permissions:
- modifyworld.*
Admins:
prefix: '&0(&4Admins&0)&7 '
permissions:
- permissions.*
users:
YourPlayerName:
group:
- Admins
