fix API issue with wordpress plugin

plugin makes api calls to external website suddenly died. need to diagnose and resolve. plugin file excerpt: ============================ // GLOBAL VAIRABLES $show_schedule = 0; // WHEN THIS IS SET TO 1 THEN EXTERNAL CSS/JAVASCRIPT IS ADDED TO PAGE HEADER // INCLUDE FILES include('includes/[login to view URL]'); // LOAD ALL JAVASCRIPT AN CSS FILES FOR THE PLUGIN include('includes/[login to view URL]'); // DEFINE THE CLASS TO ISSUE SOAP REQUESTS TO THE MINDBODY API include('includes/[login to view URL]'); // FUNCTIONALITY TO RETRIEVE SCHEDULE DATA USING THE MINDBODY API CLASS include('includes/[login to view URL]'); // FUNCTIONALITY TO DISPLAY THE ADELINE YOGA CLASS SCHEDULE // THIS FUNCTION IS CALLED BY THE '[mindbody-schedule]' SHORTCODE AND DISPLAYS THE ADELINE YOGA STUDIO CLASS SCHEDULE function display_mindbody_schedule($atts) { global $show_schedule; $show_schedule = 1; // SHORTCODE EXISTS IN PAGE/POST - INCLUDE EXTERNAL CSS/JAVASCRIPT FILES ================================== API File Excerpts =============================== <?php ini_set("user_agent", $_SERVER['HTTP_USER_AGENT']); // API requests require a User-Agent header // MINDBODY SITE ID const SITE_ID = 'XXXXXXXX'; // MINDBODY SOURCE CREDENTIALS const SOURCE_NAME = 'XXXXXXXXX'; const KEY = 'XXXXXXXXX='; // MINDBODY USER CREDEENTIALS const USERNAME = 'XXXXXXXXX'; const PASSWORD = 'XXXXXXXXX'; protected $client; protected $sourceCreds = array("SourceName"=>self::SOURCE_NAME, "Password"=>self::KEY, "SiteIDs"=>array(self::SITE_ID)); protected $userCreds = array("Username"=>self::USERNAME, "Password"=>self::PASSWORD, "SiteIDs"=>array(self::SITE_ID)); // THIS FUNCTION PERFORMS A SOAP API CALL TO RETRIEVE A LIST OF CLASS SCHEDULES function GetClasses($params = array()) { $this->client = new SoapClient(self::CLASS_WSDL_FILE, array("soap_version"=>SOAP_1_1, 'trace'=>true)); $this->client->__setLocation("[login to view URL]"); $request = array_merge(array("SourceCredentials"=>$this->sourceCreds, "UserCredentials"=>$this->userCreds),$params); try { $result = $this->client->GetClasses(array("Request"=>$request)); //error_log("RESULT: " . $result); error_log(print_r($this->client->__getLastResponse(),true)); } catch (SoapFault $s) { error_log('ERROR:: [' . $s->faultcode . '] ' . $s->faultstring); } catch (Exception $e) { error_log('ERROR:: [' . $s->faultcode . '] ' . $s->faultstring); } return $result; } // THIS FUNCTION PERFORMS A SOAP API CALL TO RETRIEVE A LIST OF CLASSES function GetClassSchedules($params = array()) { $this->client = new SoapClient(self::CLASS_WSDL_FILE, array("soap_version"=>SOAP_1_1, 'trace'=>true)); $this->client->__setLocation("[login to view URL]"); $request = array_merge(array("SourceCredentials"=>$this->sourceCreds, "UserCredentials"=>$this->userCreds),$params); try { $result = $this->client->GetClassSchedules(array("Request"=>$request)); //error_log("RESULT: " . $result); error_log(print_r($this->client->__getLastResponse(),true)); } catch (SoapFault $s) { error_log('ERROR::: [' . $s->faultcode . '] ' . $s->faultstring); } catch (Exception $e) { error_log('ERROR::: ' . $e->getMessage()); } return $result; } // THIS FUNCTION RETURNS THE LAST ISSUED SOAP XML RESPONSE function getXMLResponse() { return $this->client->__getLastResponse(); } } ?>