A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: models/School_model.php

Line Number: 668

Backtrace:

File: /home/uniform/html/unimap2/ci/application/models/School_model.php
Line: 668
Function: _error_handler

File: /home/uniform/html/unimap2/ci/application/controllers/School.php
Line: 556
Function: get_random_school

File: /home/uniform/html/unimap2/index.php
Line: 315
Function: require_once

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