diff --git a/src/WebformNavigationHelper.php b/src/WebformNavigationHelper.php
index 6faedb9..fcca69a 100644
--- a/src/WebformNavigationHelper.php
+++ b/src/WebformNavigationHelper.php
@@ -208,6 +208,10 @@ class WebformNavigationHelper {
     $errors = array_filter($form_errors, function($key) use ($page_elements){
       return in_array($key, array_keys($page_elements));
     }, ARRAY_FILTER_USE_KEY);
+    // Strip HTML tags from errors.
+    $errors = array_map(function($v){
+      return trim(strip_tags($v));
+    }, $errors);
     // Stash the errors and return if the submission hasn't been created yet.
     if (empty($webform_submission->id())) {
       $page_errors = [$page => $errors];
diff --git a/webformnavigation.module b/webformnavigation.module
index acac12f..942d5ff 100644
--- a/webformnavigation.module
+++ b/webformnavigation.module
@@ -5,7 +5,9 @@
  * Contains webformnavigation.module.
  */
 
+use Drupal\Component\Render\FormattableMarkup;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Render\Markup;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\StringTranslation\TranslatableMarkup;
 use Drupal\webform\Utility\WebformElementHelper;
@@ -234,11 +236,11 @@ function webformnavigation_submission_validation(array &$form, FormStateInterfac
     if (!empty($page_errors)) {
       $has_errors = TRUE;
       // Set an error on the page to create separation in the error message.
-      $page_message = new TranslatableMarkup('<p class="webformnavigation-page-title"><strong>@title Page</strong></p>', ['@title' => $page['#title']]);
+      $page_message = t('<p class="webformnavigation-page-title"><strong>@title Page</strong></p>', ['@title' => $page['#title']]);
       $form_state->setErrorByName($page_key, $page_message);
       // Parse through the errors and set a form error for each.
       foreach ($page_errors as $field => $error) {
-        $message = new TranslatableMarkup('&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• @message', ['@message' => $error]);
+        $message = t('&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• @message', ['@message' => $error]);
         $form_state->setErrorByName($field, $message);
       }
     }
@@ -247,7 +249,7 @@ function webformnavigation_submission_validation(array &$form, FormStateInterfac
   if ($has_errors && !empty($webform->getThirdPartySetting('webformnavigation', 'additional_error_message'))) {
     $keys = array_keys($webform->getElementsInitializedAndFlattened());
     $additional_error_message = $webform->getThirdPartySetting('webformnavigation', 'additional_error_message');
-    $message = new TranslatableMarkup('<br><p class="webformnavigation-additional-message">@message</p>', ['@message' => $additional_error_message]);
+    $message = t('<br><p class="webformnavigation-additional-message">@message</p>', ['@message' => $additional_error_message]);
     $form_state->setErrorByName($keys[1], $message);
   }
 }