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Elenco libri di testo per anno scolastico 2026-2027

Attempted to load class "CliDumper" from namespace "Symfony\Component\VarDumper\Dumper". Did you forget a "use" statement for another namespace? (500 Whoops, looks like something went wrong.)

ClassNotFoundError

HTTP 500 Whoops, looks like something went wrong.

Attempted to load class "CliDumper" from namespace "Symfony\Component\VarDumper\Dumper".
Did you forget a "use" statement for another namespace?

Exception

Symfony\Component\ErrorHandler\Error\ ClassNotFoundError

in /web/htdocs/www.liceogalileilamezia.edu.it/home/libraries/vendor/maximebf/debugbar/src/DebugBar/DataFormatter/DataFormatter.php (line 28)
  1.      * DataFormatter constructor.
  2.      */
  3.     public function __construct()
  4.     {
  5.         $this->cloner = new VarCloner();
  6.         $this->dumper = new CliDumper();
  7.     }
  9.     /**
  10.      * @param $data
  11.      * @return string
DataFormatter->__construct() in /web/htdocs/www.liceogalileilamezia.edu.it/home/plugins/system/debug/src/AbstractDataCollector.php (line 80)
  1.      * @return DataFormatter
  2.      */
  3.     public static function getDefaultDataFormatter(): DataFormatter
  4.     {
  5.         if (self::$defaultDataFormatter === null) {
  6.             self::$defaultDataFormatter = new DataFormatter();
  7.         }
  9.         return self::$defaultDataFormatter;
  10.     }
AbstractDataCollector::getDefaultDataFormatter() in /web/htdocs/www.liceogalileilamezia.edu.it/home/plugins/system/debug/src/AbstractDataCollector.php (line 65)
  1.      * @return DataFormatter
  2.      */
  3.     public function getDataFormatter(): DataFormatter
  4.     {
  5.         if ($this->dataFormater === null) {
  6.             $this->dataFormater = self::getDefaultDataFormatter();
  7.         }
  9.         return $this->dataFormater;
  10.     }
AbstractDataCollector->getDataFormatter() in /web/htdocs/www.liceogalileilamezia.edu.it/home/plugins/system/debug/src/DataCollector/SessionCollector.php (line 87)
  2.                 $value = '***redacted***';
  3.             });
  5.             foreach ($data as $key => $value) {
  6.                 $this->sessionData[$key] = $this->getDataFormatter()->formatVar($value);
  7.             }
  8.         }
  10.         return ['data' => $this->sessionData];
  11.     }
SessionCollector->collect() in /web/htdocs/www.liceogalileilamezia.edu.it/home/plugins/system/debug/src/DataCollector/SessionCollector.php (line 58)
  1.     public function __construct($params, $collect = false)
  2.     {
  3.         parent::__construct($params);
  5.         if ($collect) {
  6.             $this->collect();
  7.         }
  8.     }
  10.     /**
  11.      * Called by the DebugBar when data needs to be collected
SessionCollector->__construct() in /web/htdocs/www.liceogalileilamezia.edu.it/home/plugins/system/debug/src/Extension/Debug.php (line 299)
  1.             if ($this->params->get('request', 1)) {
  2.                 $this->debugBar->addCollector(new RequestDataCollector());
  3.             }
  5.             if ($this->params->get('session', 1)) {
  6.                 $this->debugBar->addCollector(new SessionCollector($this->params, true));
  7.             }
  9.             if ($this->params->get('profile', 1)) {
  10.                 $this->debugBar->addCollector((new ProfileCollector($this->params))->setRequestEndTime($endTime));
  11.             }
in /web/htdocs/www.liceogalileilamezia.edu.it/home/libraries/vendor/joomla/event/src/Dispatcher.php -> onAfterRespond (line 486)
  1.                 if ($event->isStopped())
  2.                 {
  3.                     return $event;
  4.                 }
  6.                 $listener($event);
  7.             }
  8.         }
  10.         return $event;
  11.     }
Dispatcher->dispatch() in /web/htdocs/www.liceogalileilamezia.edu.it/home/libraries/src/Application/CMSApplication.php (line 332)
  2.         // Send the application response.
  3.         $this->respond();
  5.         // Trigger the onAfterRespond event.
  6.         $this->getDispatcher()->dispatch('onAfterRespond');
  7.     }
  9.     /**
  10.      * Check if the user is required to reset their password.
  11.      *
CMSApplication->execute() in /web/htdocs/www.liceogalileilamezia.edu.it/home/includes/app.php (line 61)
  2. // Set the application as global app
  3. \Joomla\CMS\Factory::$application = $app;
  5. // Execute the application.
  6. $app->execute();
require_once('/web/htdocs/www.liceogalileilamezia.edu.it/home/includes/app.php') in /web/htdocs/www.liceogalileilamezia.edu.it/home/index.php (line 283)
  1.  * define() is used rather than "const" to not error for PHP 5.2 and lower
  2.  */
  3. define('_JEXEC', 1);
  5. // Run the application - All executable code should be triggered through this file
  6. require_once dirname(__FILE__) . '/includes/app.php';

Stack Trace

ClassNotFoundError 
Symfony\Component\ErrorHandler\Error\ClassNotFoundError:
Attempted to load class "CliDumper" from namespace "Symfony\Component\VarDumper\Dumper".
Did you forget a "use" statement for another namespace?

  at /web/htdocs/www.liceogalileilamezia.edu.it/home/libraries/vendor/maximebf/debugbar/src/DebugBar/DataFormatter/DataFormatter.php:28
  at DebugBar\DataFormatter\DataFormatter->__construct()
     (/web/htdocs/www.liceogalileilamezia.edu.it/home/plugins/system/debug/src/AbstractDataCollector.php:80)
  at Joomla\Plugin\System\Debug\AbstractDataCollector::getDefaultDataFormatter()
     (/web/htdocs/www.liceogalileilamezia.edu.it/home/plugins/system/debug/src/AbstractDataCollector.php:65)
  at Joomla\Plugin\System\Debug\AbstractDataCollector->getDataFormatter()
     (/web/htdocs/www.liceogalileilamezia.edu.it/home/plugins/system/debug/src/DataCollector/SessionCollector.php:87)
  at Joomla\Plugin\System\Debug\DataCollector\SessionCollector->collect()
     (/web/htdocs/www.liceogalileilamezia.edu.it/home/plugins/system/debug/src/DataCollector/SessionCollector.php:58)
  at Joomla\Plugin\System\Debug\DataCollector\SessionCollector->__construct()
     (/web/htdocs/www.liceogalileilamezia.edu.it/home/plugins/system/debug/src/Extension/Debug.php:299)
  at Joomla\Plugin\System\Debug\Extension\Debug->onAfterRespond()
     (/web/htdocs/www.liceogalileilamezia.edu.it/home/libraries/vendor/joomla/event/src/Dispatcher.php:486)
  at Joomla\Event\Dispatcher->dispatch()
     (/web/htdocs/www.liceogalileilamezia.edu.it/home/libraries/src/Application/CMSApplication.php:332)
  at Joomla\CMS\Application\CMSApplication->execute()
     (/web/htdocs/www.liceogalileilamezia.edu.it/home/includes/app.php:61)
  at require_once('/web/htdocs/www.liceogalileilamezia.edu.it/home/includes/app.php')
     (/web/htdocs/www.liceogalileilamezia.edu.it/home/index.php:283)