Warning: fopen(/var/app/log/webhook-ad.txt): Failed to open stream: No such file or directory in /var/app/current/includes/classes/class.klogger.php on line 53

Warning: fopen(/var/app/log/webhook-ad.txt): Failed to open stream: No such file or directory in /var/app/current/includes/classes/class.klogger.php on line 53

Fatal error: Uncaught Error: Undefined constant "HTTP_HOST" in /var/app/current/ad.php:44
Stack trace:
#0 {main}
  thrown in /var/app/current/ad.php on line 44