@BuildMomentum,
Your message, "Fatal error: Call to undefined function wp_slash()", is completely different than the one in this thread, "Fatal error: Call to a member function getTranscript() on a non-object".
wp_slash() is a WordPress function. You must run Postman with WordPress 3.9 or higher. You can avoid this part of the code by disabling logging in the settings menu.
If you have additional questions, please start your own forum post. The original issue in this thread is marked as resolved.
Jason