xbilling - error in frontend

[TGates]

That's because your config file is wrong. You should have entered your panel URL, NOT your billing URL:

PHP Code:

<?php
  /**
   * API connection settings for xBilling
   * Version : 1.2.0
   * @author Aderemi Adewale (modpluz @ Sentora Forums)
   * Email : goremmy@gmail.com
   * @desc This allows front-end billing package interact with the backend module
  */
                    
  // Config;
     $cfg = array();
     $cfg['api_key'] = 'your API key here';
     $cfg['panel_url'] = 'http://panel.domain.com';
     $cfg['zpx_uid'] = 1;
                    
     if(strpos($cfg['panel_url'], 'http') === false){
         $cfg['panel_url'] = 'http://'.$cfg['panel_url'];
     }                    
?>