A PHP Error was encountered

Severity: 8192

Message: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated

Filename: controllers/Checkout.php

Line Number: 23

Backtrace:

File: /home/u986329729/domains/dropsheep.agiranx.com/public_html/application/controllers/Checkout.php
Line: 23
Function: str_replace

File: /home/u986329729/domains/dropsheep.agiranx.com/public_html/index.php
Line: 292
Function: require_once