How to translate a config menu link

Is this still valid?

I can confirm that config translation of config menu links still doesn't work, but I get a slightly different error:

The website encountered an unexpected error. Please try again later.

TypeError: Drupal\config_translation\ConfigEntityMapper::setEntity(): Argument #1 ($entity) must be of type Drupal\Core\Config\Entity\ConfigEntityInterface, null given, called in /web/core/modules/config_translation/src/ConfigEntityMapper.php on line 113 in Drupal\config_translation\ConfigEntityMapper->setEntity() (line 142 of core/modules/config_translation/src/ConfigEntityMapper.php).

Drupal\config_translation\ConfigEntityMapper->populateFromRouteMatch() (Line: 85)
Drupal\config_translation\Access\ConfigTranslationOverviewAccess->getMapperFromRouteMatch() (Line: 58)
Drupal\config_translation\Access\ConfigTranslationOverviewAccess->access()
call_user_func_array() (Line: 160)
Drupal\Core\Access\AccessManager->performCheck() (Line: 136)
Drupal\Core\Access\AccessManager->check() (Line: 113)
Drupal\Core\Access\AccessManager->checkRequest() (Line: 104)
Drupal\Core\Routing\AccessAwareRouter->checkAccess() (Line: 89)
Drupal\Core\Routing\AccessAwareRouter->matchRequest() (Line: 105)
Symfony\Component\HttpKernel\EventListener\RouterListener->onKernelRequest()
call_user_func() (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 139)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 74)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 270)
Drupal\shield\ShieldMiddleware->bypass() (Line: 137)
Drupal\shield\ShieldMiddleware->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 686)
Drupal\Core\DrupalKernel->handle() (Line: 19)
require('/web/index.php') (Line: 71)