Fatal error: Uncaught Error: Call to undefined function StringLocator\Extensions\SQL\Tests\add_action() in /home/refref/public_html/string-locator-20250412191647/includes/Extension/SQL/Tests/class-serialized-data.php:31 Stack trace: #0 /home/refref/public_html/string-locator-20250412191647/includes/Extension/SQL/Tests/class-serialized-data.php(139): StringLocator\Extensions\SQL\Tests\Serialized_Data->__construct() #1 {main} thrown in /home/refref/public_html/string-locator-20250412191647/includes/Extension/SQL/Tests/class-serialized-data.php on line 31