There is no "template.cassiopeia.ltr" asset of a "preset" type in the registry.

[2/2] UnknownAssetException

Joomla\CMS\WebAsset\Exception\UnknownAssetException:
There is no "template.cassiopeia.ltr" asset of a "preset" type in the registry.

  at /path_to_root/libraries/src/WebAsset/WebAssetRegistry.php:134
  at Joomla\CMS\WebAsset\WebAssetRegistry->get('preset', 'template.cassiopeia.ltr')
     (/path_to_root/libraries/src/WebAsset/WebAssetManager.php:263)
  at Joomla\CMS\WebAsset\WebAssetManager->useAsset('preset', 'template.cassiopeia.ltr')
     (/path_to_root/libraries/src/WebAsset/WebAssetManager.php:197)
  at Joomla\CMS\WebAsset\WebAssetManager->__call('usepreset', array('template.cassiopeia.ltr'))
     (/path_to_root/templates/mueller/error.php:70)
  at require('/path_to_root/templates/mueller/error.php')
     (/path_to_root/libraries/src/Document/HtmlDocument.php:737)
  at Joomla\CMS\Document\HtmlDocument->_loadTemplate('/path_to_root/templates/mueller', 'error.php')
     (/path_to_root/libraries/src/Document/HtmlDocument.php:792)
  at Joomla\CMS\Document\HtmlDocument->_fetchTemplate(array('template' => 'mueller', 'directory' => '/path_to_root/templates', 'debug' => true, 'csp_nonce' => null, 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php'))
     (/path_to_root/libraries/src/Document/HtmlDocument.php:609)
  at Joomla\CMS\Document\HtmlDocument->parse(array('template' => 'mueller', 'directory' => '/path_to_root/templates', 'debug' => true, 'csp_nonce' => null, 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php'))
     (/path_to_root/libraries/src/Document/HtmlDocument.php:627)
  at Joomla\CMS\Document\HtmlDocument->render(false, array('template' => 'mueller', 'directory' => '/path_to_root/templates', 'debug' => true, 'csp_nonce' => null, 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php'))
     (/path_to_root/libraries/src/Document/ErrorDocument.php:139)
  at Joomla\CMS\Document\ErrorDocument->render(false, array('template' => 'mueller', 'directory' => '/path_to_root/templates', 'debug' => true, 'csp_nonce' => null, 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php'))
     (/path_to_root/libraries/src/Error/Renderer/HtmlRenderer.php:78)
  at Joomla\CMS\Error\Renderer\HtmlRenderer->render(object(Error))
     (/path_to_root/libraries/src/Exception/ExceptionHandler.php:121)
  at Joomla\CMS\Exception\ExceptionHandler::render(object(Error))
     (/path_to_root/libraries/src/Exception/ExceptionHandler.php:72)
  at Joomla\CMS\Exception\ExceptionHandler::handleException(object(Error))
     (/path_to_root/libraries/src/Application/CMSApplication.php:322)
  at Joomla\CMS\Application\CMSApplication->execute()
     (/path_to_root/includes/app.php:61)
  at require_once('/path_to_root/includes/app.php')
     (/path_to_root/index.php:32)                

[1/2] Error

Error:
Failed opening required '/path_to_root/components/com_content/helpers/route.php' (include_path='.:/opt/plesk/php/8.0/share/pear')

  at /path_to_root/modules/mod_articles_news_adv/helper.php:12
  at require_once()
     (/path_to_root/modules/mod_bootstrap_collapse/helper.php:14)
  at require_once('/path_to_root/modules/mod_bootstrap_collapse/helper.php')
     (/path_to_root/modules/mod_bootstrap_collapse/mod_bootstrap_collapse.php:15)
  at include('/path_to_root/modules/mod_bootstrap_collapse/mod_bootstrap_collapse.php')
     (/path_to_root/libraries/src/Dispatcher/ModuleDispatcher.php:52)
  at Joomla\CMS\Dispatcher\ModuleDispatcher::Joomla\CMS\Dispatcher\{closure}('/path_to_root/modules/mod_bootstrap_collapse/mod_bootstrap_collapse.php', null)
     (/path_to_root/libraries/src/Dispatcher/ModuleDispatcher.php:55)
  at Joomla\CMS\Dispatcher\ModuleDispatcher->dispatch()
     (/path_to_root/libraries/src/Helper/ModuleHelper.php:281)
  at Joomla\CMS\Helper\ModuleHelper::renderRawModule(object(stdClass), object(Registry), array('name' => 'debug'))
     (/path_to_root/libraries/src/Helper/ModuleHelper.php:161)
  at Joomla\CMS\Helper\ModuleHelper::renderModule(object(stdClass), array('name' => 'debug'))
     (/path_to_root/libraries/src/Document/Renderer/Html/ModuleRenderer.php:99)
  at Joomla\CMS\Document\Renderer\Html\ModuleRenderer->render(object(stdClass), array('name' => 'debug'), null)
     (/path_to_root/libraries/src/Document/Renderer/Html/ModulesRenderer.php:50)
  at Joomla\CMS\Document\Renderer\Html\ModulesRenderer->render('debug', array('name' => 'debug'), null)
     (/path_to_root/libraries/src/Document/HtmlDocument.php:566)
  at Joomla\CMS\Document\HtmlDocument->getBuffer('modules', 'debug', array('name' => 'debug'))
     (/path_to_root/libraries/src/Document/HtmlDocument.php:849)
  at Joomla\CMS\Document\HtmlDocument->_renderTemplate()
     (/path_to_root/libraries/src/Document/HtmlDocument.php:634)
  at Joomla\CMS\Document\HtmlDocument->render(false, array('template' => 'mueller', 'file' => 'index.php', 'params' => object(Registry), 'csp_nonce' => null, 'templateInherits' => null, 'directory' => '/path_to_root/templates'))
     (/path_to_root/libraries/src/Application/CMSApplication.php:1025)
  at Joomla\CMS\Application\CMSApplication->render()
     (/path_to_root/libraries/src/Application/SiteApplication.php:724)
  at Joomla\CMS\Application\SiteApplication->render()
     (/path_to_root/libraries/src/Application/CMSApplication.php:298)
  at Joomla\CMS\Application\CMSApplication->execute()
     (/path_to_root/includes/app.php:61)
  at require_once('/path_to_root/includes/app.php')
     (/path_to_root/index.php:32)