Incorrect checking of upload server limit in WebService upload.php script

If you set Administration > Security -> Site policies -> Maximum uploaded file size to sever limit the $CFG>maxbytes setting will be set to 0, this will prevent any file to be uploaded

Check:

if (($_FILES[$fieldname]['size'] > $CFG->maxbytes)) {

This will always return true, so you can't upload files

I think this will fix the problem:

if ($CFG->maxbytes && ($_FILES[$fieldname]['size'] > $CFG->maxbytes)) {