diff --git a/src/Symfony/Bundle/WebProfilerBundle/CHANGELOG.md b/src/Symfony/Bundle/WebProfilerBundle/CHANGELOG.md
index e082d113208db..253c125e12655 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/CHANGELOG.md
+++ b/src/Symfony/Bundle/WebProfilerBundle/CHANGELOG.md
@@ -7,7 +7,7 @@ CHANGELOG
  * Added button to clear the ajax request tab
  * Deprecated the `ExceptionController::templateExists()` method
  * Deprecated the `TemplateManager::templateExists()` method
- * Deprecated the `ExceptionController` in favor of `ExceptionErrorController`
+ * Deprecated the `ExceptionController` in favor of `ExceptionPanelController`
  * Marked all classes of the WebProfilerBundle as internal
 
 4.3.0
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionController.php b/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionController.php
index d6bedd8f3962a..8650d289c6621 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionController.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionController.php
@@ -20,15 +20,14 @@
 use Twig\Error\LoaderError;
 use Twig\Loader\ExistsLoaderInterface;
 
-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', ExceptionController::class, ExceptionErrorController::class), E_USER_DEPRECATED);
+@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', ExceptionController::class, ExceptionPanelController::class), E_USER_DEPRECATED);
 
 /**
  * ExceptionController.
  *
  * @author Fabien Potencier <fabien@symfony.com>
  *
- * @deprecated since Symfony 4.4, use the ExceptionErrorController instead.
- * @internal since Symfony 4.4
+ * @deprecated since Symfony 4.4, use the ExceptionPanelController instead.
  */
 class ExceptionController
 {
@@ -106,7 +105,7 @@ public function cssAction($token)
 
         $template = $this->getTemplate();
 
-        if (!$this->templateExists($template, false)) {
+        if (!$this->templateExists($template)) {
             return new Response($this->errorRenderer->getStylesheet(), 200, ['Content-Type' => 'text/css']);
         }
 
@@ -118,15 +117,8 @@ protected function getTemplate()
         return '@Twig/Exception/'.($this->debug ? 'exception' : 'error').'.html.twig';
     }
 
-    /**
-     * @deprecated since Symfony 4.4
-     */
-    protected function templateExists($template/*, bool $triggerDeprecation = true */)
+    protected function templateExists($template)
     {
-        if (1 === \func_num_args()) {
-            @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.4, use the "exists()" method of the Twig loader instead.', __METHOD__), E_USER_DEPRECATED);
-        }
-
         $loader = $this->twig->getLoader();
         if ($loader instanceof ExistsLoaderInterface) {
             return $loader->exists($template);
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionErrorController.php b/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionPanelController.php
similarity index 91%
rename from src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionErrorController.php
rename to src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionPanelController.php
index c0833067cf013..cff1f39400c16 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionErrorController.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionPanelController.php
@@ -20,8 +20,10 @@
  * Renders the exception panel.
  *
  * @author Yonel Ceruto <yonelceruto@gmail.com>
+ *
+ * @internal
  */
-class ExceptionErrorController
+class ExceptionPanelController
 {
     private $htmlErrorRenderer;
     private $profiler;
@@ -46,7 +48,7 @@ public function body(string $token): Response
             ->getException()
         ;
 
-        return new Response($this->htmlErrorRenderer->getBody($exception));
+        return new Response($this->htmlErrorRenderer->getBody($exception), 200, ['Content-Type' => 'text/html']);
     }
 
     /**
@@ -54,6 +56,6 @@ public function body(string $token): Response
      */
     public function stylesheet(): Response
     {
-        return new Response($this->htmlErrorRenderer->getStylesheet());
+        return new Response($this->htmlErrorRenderer->getStylesheet(), 200, ['Content-Type' => 'text/css']);
     }
 }
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Resources/config/profiler.xml b/src/Symfony/Bundle/WebProfilerBundle/Resources/config/profiler.xml
index 962e1418bd131..0d68bf00b04c6 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Resources/config/profiler.xml
+++ b/src/Symfony/Bundle/WebProfilerBundle/Resources/config/profiler.xml
@@ -28,10 +28,10 @@
             <argument>%kernel.debug%</argument>
             <argument type="service" id="debug.file_link_formatter" />
             <argument type="service" id="error_renderer.renderer.html" />
-            <deprecated>The "%service_id%" service is deprecated since Symfony 4.4, use the "web_profiler.controller.exception_error" service instead.</deprecated>
+            <deprecated>The "%service_id%" service is deprecated since Symfony 4.4, use the "web_profiler.controller.exception_panel" service instead.</deprecated>
         </service>
 
-        <service id="web_profiler.controller.exception_error" class="Symfony\Bundle\WebProfilerBundle\Controller\ExceptionErrorController" public="true">
+        <service id="web_profiler.controller.exception_panel" class="Symfony\Bundle\WebProfilerBundle\Controller\ExceptionPanelController" public="true">
             <argument type="service" id="error_renderer.renderer.html" />
             <argument type="service" id="profiler" on-invalid="null" />
         </service>
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Resources/config/routing/profiler.xml b/src/Symfony/Bundle/WebProfilerBundle/Resources/config/routing/profiler.xml
index 0eb4ea72ff33a..f20cba0e673f9 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Resources/config/routing/profiler.xml
+++ b/src/Symfony/Bundle/WebProfilerBundle/Resources/config/routing/profiler.xml
@@ -37,11 +37,11 @@
     </route>
 
     <route id="_profiler_exception" path="/{token}/exception">
-        <default key="_controller">web_profiler.controller.exception_error::body</default>
+        <default key="_controller">web_profiler.controller.exception_panel::body</default>
     </route>
 
     <route id="_profiler_exception_css" path="/{token}/exception.css">
-        <default key="_controller">web_profiler.controller.exception_error::stylesheet</default>
+        <default key="_controller">web_profiler.controller.exception_panel::stylesheet</default>
     </route>
 
 </routes>