A PHP Error was encountered

Severity: Warning

Message: Undefined array key "06"

Filename: views/report.html

Line Number: 71

Backtrace:

File: /var/task/user/application/views/report.html
Line: 71
Function: _error_handler

File: /var/task/user/vendor/nguyenanhung/codeigniter-framework/thirdParty/MX/Loader.php
Line: 624
Function: include

File: /var/task/user/vendor/nguyenanhung/codeigniter-framework/thirdParty/MX/Loader.php
Line: 530
Function: _ci_load

File: /var/task/user/application/controllers/Main.php
Line: 438
Function: view

File: /var/task/user/index.php
Line: 291
Function: require_once

File: /var/task/user/api/index.php
Line: 3
Function: require