Fatal error: Uncaught Error: Call to undefined function test() in /var/www/html/api/cool_workers/vendor/laravel/serializable-closure/tests/SerializerPhp81Test.php:7 Stack trace: #0 {main} thrown in /var/www/html/api/cool_workers/vendor/laravel/serializable-closure/tests/SerializerPhp81Test.php on line 7