Internal Server Error

Script Error:

Missing Content-type in headers:
Status: 304 Not Modified
X-Powered-By: PHP/5.6.38
X-Pingback: http://marscorrect.com/cgi/wp/xmlrpc.php
Last-Modified: Sun, 11 May 2014 15:32:19 GMT
ETag: "b0cdce7cb0a040cdd148b5a5e777caf0"

Script Output: