Installing Honeypot via UI results in unexpected error due to unavailable honeypot.config route

In Drupal 8.1.x (doesn't seem to happen in 8.0.x), when I enable Honeypot in the admin UI (modules/extend page), I see:

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

In the logs:

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "honeypot.config" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 191 of /var/www/drupalvm/drupal/core/lib/Drupal/Core/Routing/RouteProvider.php).

I seem to remember specifically fixing this bug elsewhere by switching the code in hook_install() to use Url::fromUri... but my memory is quite foggy on that at this point.

Here's the current code in 8.x-1.x:

/**
 * Implements hook_install().
 */
function honeypot_install() {
  if (PHP_SAPI !== 'cli') {
    $config_url = Url::fromUri('base://admin/config/content/honeypot');
    drupal_set_message(t("Honeypot installed successfully. Please @link to protect your forms from spam bots.", [
      '@link' => \Drupal::l(t('configure Honeypot'), $config_url),
    ]));
  }
}

Whatever the case, even though the module installs successfully, this error-on-install is quite jarring, and I'd like to get it fixed.