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A PHP Error was encountered

Severity: Notice

Message: Undefined variable: token_name

Filename: student/login_retrieve_password.php

Line Number: 20

Backtrace:

File: /home/cucas/v2zafu/application/views/student/login_retrieve_password.php
Line: 20
Function: _error_handler

File: /home/cucas/v2zafu/application/core/MY_Controller.php
Line: 80
Function: view

File: /home/cucas/v2zafu/application/controllers/student/Login.php
Line: 293
Function: _view

File: /home/cucas/v2zafu/index.php
Line: 353
Function: require_once