Would be good if debug was enabled so we could see the call stack.

Call Stack
# 	Function 	Location
1 	() 	JROOT\libraries\src\WebAuthn\Server.php:297
2 	Joomla\CMS\WebAuthn\Server->loadAndCheckAttestationResponse() 	JROOT\plugins\multifactorauth\webauthn\src\Helper\Credentials.php:126
3 	Joomla\Plugin\Multifactorauth\Webauthn\Helper\Credentials::verifyAttestation() 	JROOT\plugins\multifactorauth\webauthn\src\Extension\Webauthn.php:240
4 	Joomla\Plugin\Multifactorauth\Webauthn\Extension\Webauthn->onUserMultifactorSaveSetup() 	JROOT\libraries\vendor\joomla\event\src\Dispatcher.php:454
5 	Joomla\Event\Dispatcher->dispatch() 	JROOT\administrator\components\com_users\src\Controller\MethodController.php:323
6 	Joomla\Component\Users\Administrator\Controller\MethodController->save() 	JROOT\libraries\src\MVC\Controller\BaseController.php:730
7 	Joomla\CMS\MVC\Controller\BaseController->execute() 	JROOT\administrator\components\com_users\src\Controller\MethodController.php:80
8 	Joomla\Component\Users\Administrator\Controller\MethodController->execute() 	JROOT\libraries\src\Dispatcher\ComponentDispatcher.php:143
9 	Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch() 	JROOT\libraries\src\Component\ComponentHelper.php:361
10 	Joomla\CMS\Component\ComponentHelper::renderComponent() 	JROOT\libraries\src\Application\AdministratorApplication.php:150
11 	Joomla\CMS\Application\AdministratorApplication->dispatch() 	JROOT\libraries\src\Application\AdministratorApplication.php:195
12 	Joomla\CMS\Application\AdministratorApplication->doExecute() 	JROOT\libraries\src\Application\CMSApplication.php:306
13 	Joomla\CMS\Application\CMSApplication->execute() 	JROOT\administrator\includes\app.php:58
14 	require_once() 	JROOT\administrator\index.php:32