Couldn't optimize my project after installed this package .

[RosyStephen]

php artisan optimize

INFO Caching the framework bootstrap files.

config ................................................................................................................................. 51ms FAIL

LogicException

Your configuration files are not serializable.

at D:\SERVER\sites\global\vendor\laravel\framework\src\Illuminate\Foundation\Console\ConfigCacheCommand.php:84
80▕ require $configPath;
81▕ } catch (Throwable $e) {
82▕ $this->files->delete($configPath);
83▕
➜ 84▕ throw new LogicException('Your configuration files are not serializable.', 0, $e);
85▕ }
86▕
87▕ $this->components->info('Configuration cached successfully.');
88▕ }

1 D:\SERVER\sites\global\bootstrap\cache\config.php:787
Error::("Call to undefined method Closure::__set_state()")

2 D:\SERVER\sites\global\vendor\laravel\framework\src\Illuminate\Foundation\Console\ConfigCacheCommand.php:80
require()