diff --git a/src/Controller/NewsletterController.php b/src/Controller/NewsletterController.php
index e314e48..79cad6e 100644
--- a/src/Controller/NewsletterController.php
+++ b/src/Controller/NewsletterController.php
@@ -15,6 +15,7 @@
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 use Symfony\Component\Security\Csrf\CsrfToken;
 use Symfony\Component\Security\Csrf\CsrfTokenManager;
 use Symfony\Contracts\Translation\TranslatorInterface;
@@ -57,24 +58,31 @@ public function subscribeAction(Request $request): JsonResponse
             ], Response::HTTP_BAD_REQUEST);
         }
 
-        $errors = $this->validator->validate($email);
+        try {
+            $errors = $this->validator->validate($email);
 
-        if (!$this->tokenManager->isTokenValid(new CsrfToken('newsletter', $token))) {
-            $errors[] = $this->translator->trans('bitbag_sylius_mailchimp_plugin.ui.invalid_csrf_token');
-        }
+            if (!$this->tokenManager->isTokenValid(new CsrfToken('newsletter', $token))) {
+                $errors[] = $this->translator->trans('bitbag_sylius_mailchimp_plugin.ui.invalid_csrf_token');
+            }
+
+            if (count($errors) === 0) {
+                $this->handler->subscribe($email);
 
-        if (count($errors) === 0) {
-            $this->handler->subscribe($email);
+                return new JsonResponse([
+                    'success' => true,
+                    'message' => $this->translator->trans('bitbag_sylius_mailchimp_plugin.ui.subscribed_successfully'),
+                ]);
+            }
 
             return new JsonResponse([
-                'success' => true,
-                'message' => $this->translator->trans('bitbag_sylius_mailchimp_plugin.ui.subscribed_successfully'),
-            ]);
+                'success' => false,
+                'errors' => json_encode($errors),
+            ], Response::HTTP_BAD_REQUEST);
+        } catch (BadRequestHttpException $e) {
+            return new JsonResponse([
+                'success' => false,
+                'errors' => json_encode([$this->translator->trans('bitbag_sylius_mailchimp_plugin.ui.unexpected_error')]),
+            ], Response::HTTP_BAD_REQUEST);
         }
-
-        return new JsonResponse([
-            'success' => false,
-            'errors' => json_encode($errors),
-        ], Response::HTTP_BAD_REQUEST);
     }
 }
diff --git a/src/Resources/public/bitbag-mailchimp-plugin-newsletter.js b/src/Resources/public/bitbag-mailchimp-plugin-newsletter.js
index 4d423ef..9f4832c 100644
--- a/src/Resources/public/bitbag-mailchimp-plugin-newsletter.js
+++ b/src/Resources/public/bitbag-mailchimp-plugin-newsletter.js
@@ -9,6 +9,7 @@ import { $ } from 'jquery';
                 event.preventDefault();
 
                 var successElement = form.find('.success-element');
+                var input = form.find('input[type=text]');
                 var validationElement = form.find('.validation-element');
 
                 successElement.text('');
@@ -22,10 +23,15 @@ import { $ } from 'jquery';
                     .done(function (response) {
                         if (response.hasOwnProperty('message')) {
                             successElement.html(response.message);
+                            input.val('');
                         }
                     })
                     .fail(function (response) {
-                        if (response.responseJSON.hasOwnProperty('errors')) {
+                        if (!response.responseJSON) {
+                            var message = 'An unexpected error occurred. Please try again later.';
+
+                            validationElement.text(message);
+                        } else if (response.responseJSON.hasOwnProperty('errors')) {
                             var errors = $.parseJSON(response.responseJSON.errors);
                             var message = '';
 
diff --git a/src/Resources/translations/messages.en.yml b/src/Resources/translations/messages.en.yml
index 0c97339..bb88e15 100644
--- a/src/Resources/translations/messages.en.yml
+++ b/src/Resources/translations/messages.en.yml
@@ -7,3 +7,4 @@ bitbag_sylius_mailchimp_plugin:
         invalid_csrf_token: Submited CSRF token is invalid.
         unsubscribed_successfully: You are now unsubscribed from the newsletter.
         invalid_variable_type: Invalid variable type
+        unexpected_error: An unexpected error occurred. Please try again later.
diff --git a/src/Resources/translations/messages.fr.yml b/src/Resources/translations/messages.fr.yml
index 0a70c01..4c3569a 100644
--- a/src/Resources/translations/messages.fr.yml
+++ b/src/Resources/translations/messages.fr.yml
@@ -5,3 +5,4 @@ bitbag_sylius_mailchimp_plugin:
         your_email_address: Votre adresse email
         subscribed_successfully: Vous êtes bien inscrit à notre newsletter.
         invalid_csrf_token: Le jeton CSRF est invalide.
+        unexpected_error: Une erreur inattendue est apparue. Veuillez réessayer plus tard.
diff --git a/src/Resources/translations/messages.nl.yml b/src/Resources/translations/messages.nl.yml
index f83bb52..68b7fc2 100644
--- a/src/Resources/translations/messages.nl.yml
+++ b/src/Resources/translations/messages.nl.yml
@@ -5,3 +5,4 @@ bitbag_sylius_mailchimp_plugin:
         your_email_address: Jouw e-mailadres
         subscribed_successfully: Je bent nu geabonneerd op de nieuwsbrief.
         invalid_csrf_token: Ingediende CSRF-token is ongeldig.
+        unexpected_error: Er is een onverwachte fout opgetreden. Probeer het later opnieuw.
diff --git a/src/Resources/translations/messages.pl.yml b/src/Resources/translations/messages.pl.yml
index b2caed9..aaaeaa2 100644
--- a/src/Resources/translations/messages.pl.yml
+++ b/src/Resources/translations/messages.pl.yml
@@ -5,3 +5,4 @@ bitbag_sylius_mailchimp_plugin:
         your_email_address: Twój adres email
         subscribed_successfully: Zostałeś zapisany do newslettera.
         invalid_csrf_token: Przesłany token CSRF jest nieprawidłowy. Prosimy spróbować ponownie.
+        unexpected_error: Wystapił nieoczekiwany błąd. Prosimy spróbować ponownie.