in the globals/global.php, change the follong line:
$WAGLOBAL_Root_URL = (((isset($_SERVER['SERVER_PROTOCOL']) && strpos($_SERVER['SERVER_PROTOCOL'], 'HTTPS') !== false) || (isset($_SERVER['SERVER_PORT'])&& $_SERVER['SERVER_PORT'] == 443)) ? 'https://' : 'http://') . $_SERVER['SERVER_NAME'] . ( (isset($_SERVER['SERVER_PORT'])&& $_SERVER['SERVER_PORT'] != 80)?":".$_SERVER['SERVER_PORT']:"") . $assumedRoot;
to:
$WAGLOBAL_Root_URL = (((isset($_SERVER['SERVER_PROTOCOL']) && strpos($_SERVER['SERVER_PROTOCOL'], 'HTTPS') !== false) || (isset($_SERVER['SERVER_PORT'])&& $_SERVER['SERVER_PORT'] == 443)) ? 'https://' : 'http://') . $_SERVER['SERVER_NAME'] . ( (isset($_SERVER['SERVER_PORT'])&& ($_SERVER['SERVER_PORT'] != 80 || $_SERVER['SERVER_PORT'] != 443))?":".$_SERVER['SERVER_PORT']:"") . $assumedRoot;