How to fix server authentication error in post-trigger event

Hello,

I am attempting to execute a command that should prompt the server to return a list of items defined by a query. However, the sever execute:

try {

  serverResponse = serverCmdRunner.execute();

  } catch (ae){

  var msg = ae.getMessage();

  return null;    

  }

  return serverResponse;

This try catch block is throwing an error. The message returned by that error is:

    [API-issues]: Authentication failed for  on m***ptc-02.h****s.com:7002

I am not sure why this script is failing authentication, any ideas where my problem might be, or what direction to look in?