A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 0

Filename: controllers/Study_materials.php

Line Number: 74

Backtrace:

File: /home/reliableacademy/public_html/application/controllers/Study_materials.php
Line: 74
Function: _error_handler

File: /home/reliableacademy/public_html/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Trying to get property 'CategoryId' of non-object

Filename: controllers/Study_materials.php

Line Number: 74

Backtrace:

File: /home/reliableacademy/public_html/application/controllers/Study_materials.php
Line: 74
Function: _error_handler

File: /home/reliableacademy/public_html/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/reliableacademy/public_html/system/core/Exceptions.php:271)

Filename: core/Common.php

Line Number: 564

Backtrace:

File: /home/reliableacademy/public_html/application/controllers/Study_materials.php
Line: 93
Function: show_404

File: /home/reliableacademy/public_html/index.php
Line: 315
Function: require_once

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