diff -u b/core/modules/update/src/Controller/UpdateController.php b/core/modules/update/src/Controller/UpdateController.php
--- b/core/modules/update/src/Controller/UpdateController.php
+++ b/core/modules/update/src/Controller/UpdateController.php
@@ -32,7 +32,7 @@
    *
    * @param \Drupal\update\UpdateManagerInterface $update_manager
    *   Update Manager Service.
-   * @param \Drupal\Core\Render\RendererInterface $renderer
+   * @param \Drupal\Core\Render\RendererInterface|null $renderer
    *   The renderer.
    */
   public function __construct(UpdateManagerInterface $update_manager, RendererInterface $renderer = NULL) {
diff -u b/core/modules/update/src/UpdateFetcher.php b/core/modules/update/src/UpdateFetcher.php
--- b/core/modules/update/src/UpdateFetcher.php
+++ b/core/modules/update/src/UpdateFetcher.php
@@ -55,10 +55,10 @@
    *   The config factory.
    * @param \GuzzleHttp\ClientInterface $http_client
    *   A Guzzle client object.
-   * @param \Drupal\Core\Site\Settings $settings
+   * @param \Drupal\Core\Site\Settings|null $settings
    *   The settings instance.
    */
-  public function __construct(ConfigFactoryInterface $config_factory, ClientInterface $http_client, Settings $settings) {
+  public function __construct(ConfigFactoryInterface $config_factory, ClientInterface $http_client, Settings $settings = NULL) {
     $this->fetchUrl = $config_factory->get('update.settings')->get('fetch.url');
     $this->httpClient = $http_client;
     $this->updateSettings = $config_factory->get('update.settings');
diff -u b/core/modules/update/tests/src/Kernel/UpdateReportTest.php b/core/modules/update/tests/src/Kernel/UpdateReportTest.php
--- b/core/modules/update/tests/src/Kernel/UpdateReportTest.php
+++ b/core/modules/update/tests/src/Kernel/UpdateReportTest.php
@@ -2,6 +2,8 @@
 
 namespace Drupal\Tests\update\Kernel;
 
+use Drupal\Core\Link;
+use Drupal\Core\Url;
 use Drupal\KernelTests\KernelTestBase;
 use Drupal\Tests\user\Traits\UserCreationTrait;
 
@@ -63,6 +65,12 @@
    * @see template_preprocess_update_fetch_error_message()
    */
   public function testTemplatePreprocessUpdateFetchErrorMessageNoDblog() {
+    $build = [
+      '#theme' => 'update_fetch_error_message',
+    ];
+    $this->render($build);
+    $this->assertRaw('Failed to fetch available update data:<ul><li>See <a href="https://www.drupal.org/node/3170647">PHP OpenSSL requirements</a> in the Drupal.org handbook for possible reasons this could happen and what you can do to resolve them.</li><li>Check your local system logs for additional error messages.</li></ul>');
+
     \Drupal::moduleHandler()->loadInclude('update', 'inc', 'update.report');
     $variables = [];
     template_preprocess_update_fetch_error_message($variables);
@@ -87,6 +95,12 @@
     // First, try as a normal user that can't access dblog.
     $this->setUpCurrentUser();
 
+    $build = [
+      '#theme' => 'update_fetch_error_message',
+    ];
+    $this->render($build);
+    $this->assertRaw('Failed to fetch available update data:<ul><li>See <a href="https://www.drupal.org/node/3170647">PHP OpenSSL requirements</a> in the Drupal.org handbook for possible reasons this could happen and what you can do to resolve them.</li><li>Check your local system logs for additional error messages.</li></ul>');
+
     $variables = [];
     template_preprocess_update_fetch_error_message($variables);
     $this->assertArrayHasKey('error_message', $variables);
@@ -98,6 +112,12 @@
     // Now, try as an admin that can access dblog.
     $this->setUpCurrentUser([], ['access content', 'access site reports']);
 
+    $this->render($build);
+    $this->assertRaw('Failed to fetch available update data:<ul><li>See <a href="https://www.drupal.org/node/3170647">PHP OpenSSL requirements</a> in the Drupal.org handbook for possible reasons this could happen and what you can do to resolve them.</li><li>Check');
+    $dblog_url = Url::fromRoute('dblog.overview', [], ['query' => ['type' => ['update']]]);
+    $this->assertRaw(Link::fromTextAndUrl('your local system logs', $dblog_url)->toString());
+    $this->assertRaw(' for additional error messages.</li></ul>');
+
     $variables = [];
     template_preprocess_update_fetch_error_message($variables);
     $this->assertArrayHasKey('error_message', $variables);
diff -u b/core/modules/update/update.report.inc b/core/modules/update/update.report.inc
--- b/core/modules/update/update.report.inc
+++ b/core/modules/update/update.report.inc
@@ -357,8 +357,8 @@
   ];
   if (\Drupal::moduleHandler()->moduleExists('dblog') && \Drupal::currentUser()->hasPermission('access site reports')) {
     $options = ['query' => ['type' => ['update']]];
-    $watchdog_url = Url::fromRoute('dblog.overview', [], $options);
-    $variables['error_message']['items']['#items']['dblog'] = t('Check <a href="@url">your local system logs</a> for additional error messages.', ['@url' => $watchdog_url->toString()]);
+    $dblog_url = Url::fromRoute('dblog.overview', [], $options);
+    $variables['error_message']['items']['#items']['dblog'] = t('Check <a href="@url">your local system logs</a> for additional error messages.', ['@url' => $dblog_url->toString()]);
   }
   else {
     $variables['error_message']['items']['#items']['logs'] = t('Check your local system logs for additional error messages.');