A PHP Error was encountered

Severity: Warning

Message: Undefined array key "HTTP_REFERER"

Filename: controllers/Frontend.php

Line Number: 2077

Backtrace:

File: /home/sites/27b/1/1d8d1d7360/subdomain/hms/application/modules/frontend/controllers/Frontend.php
Line: 2077
Function: _error_handler

File: /home/sites/27b/1/1d8d1d7360/subdomain/hms/index.php
Line: 292
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/sites/27b/1/1d8d1d7360/subdomain/hms/system/core/Exceptions.php:271)

Filename: helpers/url_helper.php

Line Number: 564

Backtrace:

File: /home/sites/27b/1/1d8d1d7360/subdomain/hms/application/modules/frontend/controllers/Frontend.php
Line: 2077
Function: redirect

File: /home/sites/27b/1/1d8d1d7360/subdomain/hms/index.php
Line: 292
Function: require_once