I haven’t been keen on doing this lately, but would you mind providing FTP and CP access to an environment that this occurs in? Make sure the publisher module folder and files are writable by the FTP account provided b/c I’ll need to do some debugging to figure this out. I can’t, and have never been able, to replicate this locally and I’ve gotten this report a couple of times from people.

The fix for this is to grab the cp_url() function from expressionengine/helpers/EE_url_helper.php from a version of EE greater than 2.8.1. Here is the code from 2.10 which works just fine. Replace that function with this and it will work:

function cp_url($path, $qs = '', $force_base_cp_url = FALSE)
{
 $path = trim($path, '/');
 $path = preg_replace('#^cp(/|$)#', '', $path);

 if (is_array($qs))
 {
  $qs = http_build_query($qs, AMP);
 }

 $s = ee()->session->session_id();

 if ($s)
 {
  // Remove AMP from the beginning of the query string if it exists
  $qs = preg_replace('#^'.AMP.'#', '', $qs.AMP.'S='.$s);
 }

 $path = rtrim('?/cp/'.$path, '/');

 $base = (REQ == 'CP' && ! $force_base_cp_url) ? SELF : ee()->config->item('cp_url');

 return $base.$path.rtrim('&'.$qs, '&');
}

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