[Solved] Folder not found. Please refresh and try again.

I keep getting this error when trying to upload images. I am using CKFinder (PHP) integrated with CKEditor.

$baseUrl = '/images/upload/';
$baseDir = '/home/robotics/roboticstomorrow/images/upload/';

The file permissions are set to full write access (777).
The base directory path is correct.

I also tried using the following, which still returned the same error.
$baseDir = resolveUrl($baseUrl);

Any ideas what else could be causing this error?