I could not attach file, so i used pastebin http://pastebin.com/MVFd7Gis

maybe this is related to
to #4780
?

Replying to hpvd:

maybe this is related to
to #4780
?

I read that one before i wrote this one, i don't think that one relates as it has to do with timing, in this case it wont process at all. But who knows

Pretty sure the issue is with the cleanupNotRemovedFiles() function calling a foreach loop on the variable $files. There needs to be a check if $files is empty before calling the foreach loop, as shown below. This fixed the error for me:

public static function cleanupNotRemovedFiles()
{
    $timeOneWeekAgo = strtotime('-1 week');
    $files = _glob(self::getTmpPath() . '/*');
    if(empty($files)) {
       return;
    }
    foreach ($files as $file) {
        $timeLastModified = filemtime($file);

        if ($timeOneWeekAgo > $timeLastModified) {
            unlink($file);
        }
    }
}

Thanks for the report! fixed and available in latest beta

4ec3413

In 99ff035: Fixes #4866 @ldrrp Can you please try this patch and confirm it fixes the issue for you?