Fixing JetPack related posts not showing for XMLRPC parse error

JetPack related posts are not showing, WordPress says This site cannot be accessed, and xmlrpc test shows parse error. not well formed . Here it shows you how to fix it.

Test your site

Run below command to test your site in an terminal (Any computer is fine.)

$ curl -A "Jetpack by WordPress.com" -d "<methodCall><methodName>demo.sayHello</methodName></methodCall>" https://www.your damain.com/xmlrpc.php

The correct result should be：

<?xml version="1.0" encoding="UTF-8"?>
<methodResponse>
  <params>
    <param>
      <value>
      <string>Hello!</string>
      </value>
    </param>
  </params>
</methodResponse>

It is a XMLRPC parse error if the response is:

<?xml version="1.0" encoding="UTF-8"?>
<methodResponse>
  <fault>
    <value>
      <struct>
        <member>
          <name>faultCode</name>
          <value><int>-32700</int></value>
        </member>
        <member>
          <name>faultString</name>
          <value><string>parse error. not well formed</string></value>
        </member>
      </struct>
    </value>
  </fault>
</methodResponse>

Tips: You can also test your site using https://xmlrpc.eritreo.it/. Just input your site and click Check button. Other information like username and password is not needed.

If it is an XMLRPC parse error, the result will be:

Code      Description
-32700    parse error. not well formed

Solution for parse error

Connect to your website host, run below command to install php-xml：

$ sudo apt-get install php-xml

If your host does not have apt-get installed, you may need use (Such as AWS EC2 with Amazon Linux 2):

$ sudo yum install php-xml

Retest your site, it should be OK (Restart your apache sever if needed). After your posts are synced to WordPress site, you may see related posts.

Note: Related posts will not appear unless at least 3 good related posts can be found by JetPack. See more on jetpack related posts.

Tips: For other JectPack connection issues，fix them according to fixing jetpack connection issues.