Fatal error: Uncaught Error: Call to undefined function StringLocator\Tests\add_action() in /home/refref/public_html/string-locator-20250409154331/includes/Tests/class-loopback.php:24 Stack trace: #0 /home/refref/public_html/string-locator-20250409154331/includes/Tests/class-loopback.php(182): StringLocator\Tests\Loopback->__construct() #1 {main} thrown in /home/refref/public_html/string-locator-20250409154331/includes/Tests/class-loopback.php on line 24