500 error after sending order

There is no "template.cassiopeia.ltr" asset of a "preset" type in the registry.
Joomla\CMS\WebAsset\Exception\ UnknownAssetException
in /home/folder1/sub.domain.dd/libraries/src/WebAsset/WebAssetRegistry.php (line 134)

        {
            // Check if any new file was added
            $this->parseRegistryFiles();
            if (empty($this->assets[$type][$name])) {
                throw new UnknownAssetException(sprintf('There is no "%s" asset of a "%s" type in the registry.', $name, $type));
            }
            return $this->assets[$type][$name];
        }

WebAssetRegistry->get('preset', 'template.cassiopeia.ltr') in /home/folder1/sub.domain.dd/libraries/src/WebAsset/WebAssetManager.php (line 263)
WebAssetManager->useAsset('preset', 'template.cassiopeia.ltr') in /home/folder1/sub.domain.dd/libraries/src/WebAsset/WebAssetManager.php (line 197)
WebAssetManager->__call('usepreset', array('template.cassiopeia.ltr')) in /home/folder1/sub.domain.dd/templates/mytemplate/error.php (line 66)
require('/home/folder1/sub.domain.dd/templates/mytemplate/error.php') in /home/folder1/sub.domain.dd/libraries/src/Document/HtmlDocument.php (line 741)
HtmlDocument->_loadTemplate('/home/folder1/sub.domain.dd/templates/mytemplate', 'error.php') in /home/folder1/sub.domain.dd/libraries/src/Document/HtmlDocument.php (line 796)
HtmlDocument->_fetchTemplate(array('template' => 'mytemplate', 'directory' => '/home/folder1/sub.domain.dd/templates', 'debug' => true, 'csp_nonce' => null, 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php')) in /home/folder1/sub.domain.dd/libraries/src/Document/HtmlDocument.php (line 613)
HtmlDocument->parse(array('template' => 'mytemplate', 'directory' => '/home/folder1/sub.domain.dd/templates', 'debug' => true, 'csp_nonce' => null, 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php')) in /home/folder1/sub.domain.dd/libraries/src/Document/HtmlDocument.php (line 631)
HtmlDocument->render(false, array('template' => 'mytemplate', 'directory' => '/home/folder1/sub.domain.dd/templates', 'debug' => true, 'csp_nonce' => null, 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php')) in /home/folder1/sub.domain.dd/libraries/src/Document/ErrorDocument.php (line 139)
ErrorDocument->render(false, array('template' => 'mytemplate', 'directory' => '/home/folder1/sub.domain.dd/templates', 'debug' => true, 'csp_nonce' => null, 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php')) in /home/folder1/sub.domain.dd/libraries/src/Error/Renderer/HtmlRenderer.php (line 78)
HtmlRenderer->render(object(Error)) in /home/folder1/sub.domain.dd/libraries/src/Exception/ExceptionHandler.php (line 121)
ExceptionHandler::render(object(Error)) in /home/folder1/sub.domain.dd/libraries/src/Exception/ExceptionHandler.php (line 72)
ExceptionHandler::handleException(object(Error)) in /home/folder1/sub.domain.dd/libraries/src/Application/CMSApplication.php (line 322)
CMSApplication->execute() in /home/folder1/sub.domain.dd/includes/app.php (line 61)
require_once('/home/folder1/sub.domain.dd/includes/app.php') in /home/folder1/sub.domain.dd/index.php (line 32)
Error

Call to undefined method Joomla\CMS\Application\SiteApplication::isAdmin()

Die angeforderte Seite konnte nicht gefunden werden.

Während der Anfrage ist ein Fehler aufgetreten.

Die Seite kann nicht angezeigt werden, weil:

    ein veraltetes Lesezeichen aufgerufen wurde.
    eine falsche Adresse aufgerufen wurde.
    über eine Suchmaschine ein veralteter Index dieser Website aufgerufen wurde.
    keine Zugriffsrechte für diese Seite vorhanden sind.

Zur Startseite wechseln

Bei Problemen ist der Administrator dieser Website zuständig.

    0 Call to undefined method Joomla\CMS\Application\SiteApplication::isAdmin()