A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: account/login.php

Line Number: 50

Backtrace:

File: /home/iskcontaiwan/public_html/application/views/web/account/login.php
Line: 50
Function: _error_handler

File: /home/iskcontaiwan/public_html/application/controllers/Account.php
Line: 55
Function: view

File: /home/iskcontaiwan/public_html/index.php
Line: 319
Function: require_once