Well, thats exactly the problem I got here. Its running fine on my local MAMP server environment, but as soon as I try to put it on the Linux live server, it is searching infinitely for the directory.
At the moment my setup is:
$config['doc_root'] = realpath($_SERVER['DOCUMENT_ROOT']);
var fileRoot = '/webroot/upload/';
Perfect on the Localhost, no idea why the live server doesnt like it. Maybe I should note: Im not getting the "Directory doesnt exist" message, but the spinning loading gif to infinity.
Will try that patch with the relative paths now.
https://github.com/simogeo/Filemanager/pull/94/files