I have installed fresh copy of Magento 188.8.131.52 on a custom configured Ubuntu 14.04 LAMP server. While everything is working perfectly, the only error is no status console in downloader. The downloader installs the extension successfully but black status console is not shown and a white space is shown instead of it. Secondly maintenance.flag is not deleted automatically when I click Back to Admin link. I delete it manually. Please guide me what is missing in my server's configuration that causes this error?