Your configuration files are not serializable

I ran

php artisan config:cache

on my terminal and i got a LogicException

LogicException  : Your configuration files are not serializable.

at C:\xampp\htdocs\penschool\vendor\laravel\framework\src\Illuminate\Foundation\Console\ConfigCacheCommand.php:68

 64|             require $configPath;
 65|         } catch (Throwable $e) {
 66|             $this->files->delete($configPath);
 67|
 68|             throw new LogicException('Your configuration files are not serializable.', 0, $e);
 69|         }
 70|
 71|         $this->info('Configuration cached successfully!');
 72|     }

 Exception trace:

1   Error::("Call to undefined method Closure::__set_state()")
  C:\xampp\htdocs\penschool\bootstrap\cache\config.php:241

2   require()
  C:\xampp\htdocs\penschool\vendor\laravel\framework\src\Illuminate\Foundation\Console\ConfigCacheCommand.php:64

Please use the argument -v to see more details.

I've never encountered this error before when running this command. Please any help will be appreciated. Thank you.

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