A PHP Error was encountered

Severity: Warning

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

Filename: controllers/Api.php

Line Number: 6313

Backtrace:

File: /home/fitfirst/public_html/application/controllers/Api.php
Line: 6313
Function: _error_handler

File: /home/fitfirst/public_html/index.php
Line: 150
Function: require_once

{"status":"error","message":"BMI category and User ID are required."}