This is a simple mistake that many are making with the install of the profileCustomizer MOD for dolphin community site.
Open:
/cprofile/index.php
Locate the ‘path’ setting and ensure that it is set correctly, you can get the correct path location from your /inc/header.inc.php file
Upload the fixed file and then open the customizer dolphin mod again. You should now be able to upload background images and customize the member’s profile with this incredible little toy!

