The dry run on New site had a bug where wordpress is not able to file_put_contents. WordPress has a function called unzip_file() that will unzip a zipped folder and put it into a designated folder. This function is located in wp_admin/includes/file.php. The bug came up when when the script was trying to take a zipped [...]

There are differences between anonymous and authenticated FTP connections. authenticated vs. anonymous FTP connection.