I get the above error when trying to access https://forum.hovatek.com/mobiquo/mobiquo.php
Running Version 4.5.8 on a MYBB Forum
This error will not impact the usability of your forum on the Tapatalk App. It occurs because you are accessing the mobiquo.php file using a web browser. mobiquo.php is an entry file for xmlrpc request, visit from a browser is a request with html content which would sometimes cause this kind of error. I'll ask a developer to look into this.