Call to a member function getTag() on null (500 Whoops, looks like something went wrong.)

Exceptions 2

Error

in /var/www/matholympiad.org.bd/libraries/src/WebAsset/AssetItem/LangActiveAssetItem.php (line 48)

array $dependencies = []
) {
parent::__construct($name, $uri, $options, $attributes, $dependencies);
// Prepare Uri depend from the active language
$langTag = Factory::getApplication()->getLanguage()->getTag();
$client = $this->getOption('client');
// Create Uri <client>/language/<langTag>/<langTag>.css
if ($client) {
$this->uri = $client . '/language/' . $langTag . '/' . $langTag . '.css';

LangActiveAssetItem->__construct() in /var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php (line 248)

$className = \array_key_exists('class', $options) ? $options['class'] : null;
if ($className && class_exists($nameSpace . '\\' . $className)) {
$className = $nameSpace . '\\' . $className;
return new $className($name, $uri, $options, $attributes, $dependencies);
}
return new WebAssetItem($name, $uri, $options, $attributes, $dependencies);
}

WebAssetRegistry->createAsset() in /var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php (line 420)

// Inheriting the Namespace
if ($namespace && !\array_key_exists('namespace', $options)) {
$options['namespace'] = $namespace;
}
$assetItem = $this->createAsset($name, $uri, $options);
$this->add($item['type'], $assetItem);
}
}
/**

WebAssetRegistry->parseRegistryFile() in /var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php (line 352)

$this->dataFilesNew = [];
foreach ($paths as $path) {
// Parse only if the file was not parsed already
if (empty($this->dataFilesParsed[$path])) {
$this->parseRegistryFile($path);
// Mark the file as parsed
$this->dataFilesParsed[$path] = $path;
}
}

WebAssetRegistry->parseRegistryFiles() in /var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php (line 160)

if (!\array_key_exists($type, $this->assets)) {
$this->assets[$type] = [];
}
// Check if any new file was added
$this->parseRegistryFiles();
$eventChange = 'new';
$eventAsset = $asset;
// Use "old" asset for "Changed" event, a "new" asset can be loaded by a name from the registry

WebAssetRegistry->add() in /var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetManager.php (line 525)

if ($asset instanceof WebAssetItemInterface) {
$this->registry->add($type, $asset);
} elseif (\is_string($asset)) {
$options['type'] = $type;
$assetInstance = $this->registry->createAsset($asset, $uri, $options, $attributes, $dependencies);
$this->registry->add($type, $assetInstance);
} else {
throw new \InvalidArgumentException(
sprintf(
'%s(): Argument #2 ($asset) must be a string or an instance of %s, %s given.',
__METHOD__,

WebAssetManager->registerAsset() in /var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetManager.php (line 245)

}
if ($andUse) {
$name = $arguments[0] instanceof WebAssetItemInterface ? $arguments[0]->getName() : $arguments[0];
return $this->registerAsset($type, ...$arguments)->useAsset($type, $name);
}
return $this->registerAsset($type, ...$arguments);
}

WebAssetManager->__call() in /var/www/matholympiad.org.bd/templates/cassiopeia/error.php (line 37)

$pageclass = $menu !== null ? $menu->getParams()->get('pageclass_sfx', '') : '';
// Color Theme
$paramsColorName = $this->params->get('colorName', 'colors_standard');
$assetColorName = 'theme.' . $paramsColorName;
$wa->registerAndUseStyle($assetColorName, 'global/' . $paramsColorName . '.css');
// Use a font scheme if set in the template style options
$paramsFontScheme = $this->params->get('useFontScheme', false);
$fontStyles = '';

require('/var/www/matholympiad.org.bd/templates/cassiopeia/error.php') in /var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php (line 731)

// Store the file path
$this->_file = $directory . '/' . $filename;
// Get the file content
ob_start();
require $directory . '/' . $filename;
$contents = ob_get_clean();
}
return $contents;
}

HtmlDocument->_loadTemplate() in /var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php (line 785)

$this->baseurl = Uri::base(true);
$this->params = $params['params'] ?? new Registry();
$this->template = $template;
// Load
$this->_template = $this->_loadTemplate($baseDir, $file);
return $this;
}
/**

HtmlDocument->_fetchTemplate() in /var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php (line 622)

*
* @since 1.7.0
*/
public function parse($params = [])
{
return $this->_fetchTemplate($params)->_parseTemplate();
}
/**
* Outputs the template to the browser.
*

HtmlDocument->parse() in /var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php (line 640)

public function render($caching = false, $params = [])
{
$this->_caching = $caching;
if (empty($this->_template)) {
$this->parse($params);
}
if (\array_key_exists('csp_nonce', $params) && $params['csp_nonce'] !== null) {
$this->cspNonce = $params['csp_nonce'];
}

HtmlDocument->render() in /var/www/matholympiad.org.bd/libraries/src/Document/ErrorDocument.php (line 139)

$this->debug = $params['debug'] ?? false;
$this->error = $this->_error;
$params['file'] = 'error.php';
return parent::render($cache, $params);
}
/**
* Render the backtrace
*

ErrorDocument->render() in /var/www/matholympiad.org.bd/libraries/src/Error/Renderer/HtmlRenderer.php (line 70)

ob_end_clean();
}
$this->getDocument()->setTitle(Text::_('Error') . ': ' . $error->getCode());
return $this->getDocument()->render(
false,
[
'template' => $template->template,
'directory' => JPATH_THEMES,
'debug' => JDEBUG,

HtmlRenderer->render() in /var/www/matholympiad.org.bd/libraries/src/Exception/ExceptionHandler.php (line 136)

'subject' => $app,
'document' => $renderer->getDocument(),
])
);
$data = $renderer->render($error);
// If nothing was rendered, just use the message from the Exception
if (empty($data)) {
$data = $error->getMessage();
}

ExceptionHandler::render() in /var/www/matholympiad.org.bd/libraries/src/Exception/ExceptionHandler.php (line 73)

* @since 3.10.0
*/
public static function handleException(\Throwable $error)
{
static::logException($error);
static::render($error);
}
/**
* Render the error page based on an exception.
*

ExceptionHandler::handleException() in /var/www/matholympiad.org.bd/libraries/src/Application/CMSApplication.php (line 336)

);
// Trigger the onError event.
$this->dispatchEvent('onError', $event);
ExceptionHandler::handleException($event->getError());
}
// Trigger the onBeforeRespond event.
$this->dispatchEvent(
'onBeforeRespond',

CMSApplication->execute() in /var/www/matholympiad.org.bd/includes/app.php (line 58)

// Set the application as global app
\Joomla\CMS\Factory::$application = $app;
// Execute the application.
$app->execute();

require_once('/var/www/matholympiad.org.bd/includes/app.php') in /var/www/matholympiad.org.bd/index.php (line 33)

* define() is used rather than "const" to not error for PHP 5.2 and lower
*/
define('_JEXEC', 1);
// Run the application - All executable code should be triggered through this file
require_once dirname(__FILE__) . '/includes/app.php';

RuntimeException

Failed to start the session because headers have already been sent by "/var/www/matholympiad.org.bd/index.php" at line 24.

in /var/www/matholympiad.org.bd/libraries/vendor/joomla/session/src/Storage/NativeStorage.php (line 454)

if ($this->isActive()) {
throw new \RuntimeException('Failed to start the session: already started by PHP.');
}
if (ini_get('session.use_cookies') && headers_sent($file, $line)) {
throw new \RuntimeException(
sprintf('Failed to start the session because headers have already been sent by "%s" at line %d.', $file, $line)
);
}
if (!session_start()) {

NativeStorage->start() in /var/www/matholympiad.org.bd/libraries/src/Session/Storage/JoomlaStorage.php (line 313)

$this->setId($session_clean);
$cookie->set($session_name, '', time() - 3600);
}
}
parent::start();
// Try loading data from the session
if (!empty($_SESSION['joomla'])) {
$this->data = unserialize(base64_decode($_SESSION['joomla']));
}

in /var/www/matholympiad.org.bd/libraries/vendor/joomla/session/src/Session.php -> start (line 396)

{
if ($this->isStarted()) {
return;
}
$this->store->start();
$this->setState(SessionState::ACTIVE);
// Initialise the session
$this->setCounter();

in /var/www/matholympiad.org.bd/libraries/vendor/joomla/session/src/Session.php -> start (line 327)

* @since 1.0
*/
public function has($name)
{
if (!$this->isActive()) {
$this->start();
}
return $this->store->has($name);
}

Session->has() in /var/www/matholympiad.org.bd/libraries/src/Session/Session.php (line 194)

$name = $args[2] . '.' . $name;
}
}
if (parent::has($name)) {
// Parent is used because of b/c, can be changed in Joomla 6
return parent::get($name, $default);
}
/*

Session->get() in /var/www/matholympiad.org.bd/libraries/src/Factory.php (line 372)

__CLASS__
),
E_USER_DEPRECATED
);
$instance = self::getApplication()->getSession()->get('user');
if (\is_null($id)) {
if (!($instance instanceof User)) {
$instance = User::getInstance();
}

Factory::getUser() in /var/www/matholympiad.org.bd/libraries/src/Application/SiteApplication.php (line 570)

*
* @since 3.2
*/
protected function initialiseApp($options = [])
{
$user = Factory::getUser();
// If the user is a guest we populate it with the guest user group.
if ($user->guest) {
$guestUsergroup = ComponentHelper::getParams('com_users')->get('guest_usergroup', 1);
$user->groups = [$guestUsergroup];

SiteApplication->initialiseApp() in /var/www/matholympiad.org.bd/libraries/src/Application/SiteApplication.php (line 238)

* @since 3.2
*/
protected function doExecute()
{
// Initialise the application
$this->initialiseApp();
// Mark afterInitialise in the profiler.
JDEBUG ? $this->profiler->mark('afterInitialise') : null;
// Route the application

SiteApplication->doExecute() in /var/www/matholympiad.org.bd/libraries/src/Application/CMSApplication.php (line 306)

$this->sanityCheckSystemVariables();
$this->setupLogging();
$this->createExtensionNamespaceMap();
// Perform application routines.
$this->doExecute();
// If we have an application document object, render it.
if ($this->document instanceof \Joomla\CMS\Document\Document) {
// Render the application output.
$this->render();

CMSApplication->execute() in /var/www/matholympiad.org.bd/includes/app.php (line 58)

// Set the application as global app
\Joomla\CMS\Factory::$application = $app;
// Execute the application.
$app->execute();

require_once('/var/www/matholympiad.org.bd/includes/app.php') in /var/www/matholympiad.org.bd/index.php (line 33)

* define() is used rather than "const" to not error for PHP 5.2 and lower
*/
define('_JEXEC', 1);
// Run the application - All executable code should be triggered through this file
require_once dirname(__FILE__) . '/includes/app.php';

Stack Traces 2

[2/2] Error
Error: Call to a member function getTag() on null at /var/www/matholympiad.org.bd/libraries/src/WebAsset/AssetItem/LangActiveAssetItem.php:48 at Joomla\CMS\WebAsset\AssetItem\LangActiveAssetItem->__construct() (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php:248) at Joomla\CMS\WebAsset\WebAssetRegistry->createAsset() (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php:420) at Joomla\CMS\WebAsset\WebAssetRegistry->parseRegistryFile() (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php:352) at Joomla\CMS\WebAsset\WebAssetRegistry->parseRegistryFiles() (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php:160) at Joomla\CMS\WebAsset\WebAssetRegistry->add() (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetManager.php:525) at Joomla\CMS\WebAsset\WebAssetManager->registerAsset() (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetManager.php:245) at Joomla\CMS\WebAsset\WebAssetManager->__call() (/var/www/matholympiad.org.bd/templates/cassiopeia/error.php:37) at require('/var/www/matholympiad.org.bd/templates/cassiopeia/error.php') (/var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php:731) at Joomla\CMS\Document\HtmlDocument->_loadTemplate() (/var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php:785) at Joomla\CMS\Document\HtmlDocument->_fetchTemplate() (/var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php:622) at Joomla\CMS\Document\HtmlDocument->parse() (/var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php:640) at Joomla\CMS\Document\HtmlDocument->render() (/var/www/matholympiad.org.bd/libraries/src/Document/ErrorDocument.php:139) at Joomla\CMS\Document\ErrorDocument->render() (/var/www/matholympiad.org.bd/libraries/src/Error/Renderer/HtmlRenderer.php:70) at Joomla\CMS\Error\Renderer\HtmlRenderer->render() (/var/www/matholympiad.org.bd/libraries/src/Exception/ExceptionHandler.php:136) at Joomla\CMS\Exception\ExceptionHandler::render() (/var/www/matholympiad.org.bd/libraries/src/Exception/ExceptionHandler.php:73) at Joomla\CMS\Exception\ExceptionHandler::handleException() (/var/www/matholympiad.org.bd/libraries/src/Application/CMSApplication.php:336) at Joomla\CMS\Application\CMSApplication->execute() (/var/www/matholympiad.org.bd/includes/app.php:58) at require_once('/var/www/matholympiad.org.bd/includes/app.php') (/var/www/matholympiad.org.bd/index.php:33)

[2/2] Error

Error:
Call to a member function getTag() on null

  at /var/www/matholympiad.org.bd/libraries/src/WebAsset/AssetItem/LangActiveAssetItem.php:48
  at Joomla\CMS\WebAsset\AssetItem\LangActiveAssetItem->__construct()
     (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php:248)
  at Joomla\CMS\WebAsset\WebAssetRegistry->createAsset()
     (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php:420)
  at Joomla\CMS\WebAsset\WebAssetRegistry->parseRegistryFile()
     (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php:352)
  at Joomla\CMS\WebAsset\WebAssetRegistry->parseRegistryFiles()
     (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetRegistry.php:160)
  at Joomla\CMS\WebAsset\WebAssetRegistry->add()
     (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetManager.php:525)
  at Joomla\CMS\WebAsset\WebAssetManager->registerAsset()
     (/var/www/matholympiad.org.bd/libraries/src/WebAsset/WebAssetManager.php:245)
  at Joomla\CMS\WebAsset\WebAssetManager->__call()
     (/var/www/matholympiad.org.bd/templates/cassiopeia/error.php:37)
  at require('/var/www/matholympiad.org.bd/templates/cassiopeia/error.php')
     (/var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php:731)
  at Joomla\CMS\Document\HtmlDocument->_loadTemplate()
     (/var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php:785)
  at Joomla\CMS\Document\HtmlDocument->_fetchTemplate()
     (/var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php:622)
  at Joomla\CMS\Document\HtmlDocument->parse()
     (/var/www/matholympiad.org.bd/libraries/src/Document/HtmlDocument.php:640)
  at Joomla\CMS\Document\HtmlDocument->render()
     (/var/www/matholympiad.org.bd/libraries/src/Document/ErrorDocument.php:139)
  at Joomla\CMS\Document\ErrorDocument->render()
     (/var/www/matholympiad.org.bd/libraries/src/Error/Renderer/HtmlRenderer.php:70)
  at Joomla\CMS\Error\Renderer\HtmlRenderer->render()
     (/var/www/matholympiad.org.bd/libraries/src/Exception/ExceptionHandler.php:136)
  at Joomla\CMS\Exception\ExceptionHandler::render()
     (/var/www/matholympiad.org.bd/libraries/src/Exception/ExceptionHandler.php:73)
  at Joomla\CMS\Exception\ExceptionHandler::handleException()
     (/var/www/matholympiad.org.bd/libraries/src/Application/CMSApplication.php:336)
  at Joomla\CMS\Application\CMSApplication->execute()
     (/var/www/matholympiad.org.bd/includes/app.php:58)
  at require_once('/var/www/matholympiad.org.bd/includes/app.php')
     (/var/www/matholympiad.org.bd/index.php:33)

[1/2] RuntimeException
RuntimeException: Failed to start the session because headers have already been sent by "/var/www/matholympiad.org.bd/index.php" at line 24. at /var/www/matholympiad.org.bd/libraries/vendor/joomla/session/src/Storage/NativeStorage.php:454 at Joomla\Session\Storage\NativeStorage->start() (/var/www/matholympiad.org.bd/libraries/src/Session/Storage/JoomlaStorage.php:313) at Joomla\CMS\Session\Storage\JoomlaStorage->start() (/var/www/matholympiad.org.bd/libraries/vendor/joomla/session/src/Session.php:396) at Joomla\Session\Session->start() (/var/www/matholympiad.org.bd/libraries/vendor/joomla/session/src/Session.php:327) at Joomla\Session\Session->has() (/var/www/matholympiad.org.bd/libraries/src/Session/Session.php:194) at Joomla\CMS\Session\Session->get() (/var/www/matholympiad.org.bd/libraries/src/Factory.php:372) at Joomla\CMS\Factory::getUser() (/var/www/matholympiad.org.bd/libraries/src/Application/SiteApplication.php:570) at Joomla\CMS\Application\SiteApplication->initialiseApp() (/var/www/matholympiad.org.bd/libraries/src/Application/SiteApplication.php:238) at Joomla\CMS\Application\SiteApplication->doExecute() (/var/www/matholympiad.org.bd/libraries/src/Application/CMSApplication.php:306) at Joomla\CMS\Application\CMSApplication->execute() (/var/www/matholympiad.org.bd/includes/app.php:58) at require_once('/var/www/matholympiad.org.bd/includes/app.php') (/var/www/matholympiad.org.bd/index.php:33)

[1/2] RuntimeException

RuntimeException:
Failed to start the session because headers have already been sent by "/var/www/matholympiad.org.bd/index.php" at line 24.

  at /var/www/matholympiad.org.bd/libraries/vendor/joomla/session/src/Storage/NativeStorage.php:454
  at Joomla\Session\Storage\NativeStorage->start()
     (/var/www/matholympiad.org.bd/libraries/src/Session/Storage/JoomlaStorage.php:313)
  at Joomla\CMS\Session\Storage\JoomlaStorage->start()
     (/var/www/matholympiad.org.bd/libraries/vendor/joomla/session/src/Session.php:396)
  at Joomla\Session\Session->start()
     (/var/www/matholympiad.org.bd/libraries/vendor/joomla/session/src/Session.php:327)
  at Joomla\Session\Session->has()
     (/var/www/matholympiad.org.bd/libraries/src/Session/Session.php:194)
  at Joomla\CMS\Session\Session->get()
     (/var/www/matholympiad.org.bd/libraries/src/Factory.php:372)
  at Joomla\CMS\Factory::getUser()
     (/var/www/matholympiad.org.bd/libraries/src/Application/SiteApplication.php:570)
  at Joomla\CMS\Application\SiteApplication->initialiseApp()
     (/var/www/matholympiad.org.bd/libraries/src/Application/SiteApplication.php:238)
  at Joomla\CMS\Application\SiteApplication->doExecute()
     (/var/www/matholympiad.org.bd/libraries/src/Application/CMSApplication.php:306)
  at Joomla\CMS\Application\CMSApplication->execute()
     (/var/www/matholympiad.org.bd/includes/app.php:58)
  at require_once('/var/www/matholympiad.org.bd/includes/app.php')
     (/var/www/matholympiad.org.bd/index.php:33)

RuntimeException Error

HTTP 500 Whoops, looks like something went wrong.

Call to a member function getTag() on null

Exceptions 2

Error

RuntimeException

Stack Traces 2