diff --git a/public/main/inc/global.inc.php b/public/main/inc/global.inc.php
index dd443f8cee..157835cd65 100644
--- a/public/main/inc/global.inc.php
+++ b/public/main/inc/global.inc.php
@@ -6,6 +6,7 @@ use Chamilo\CoreBundle\Framework\Container;
 use Patchwork\Utf8\Bootup;
 use Symfony\Component\Dotenv\Dotenv;
 use Symfony\Component\ErrorHandler\Debug;
+use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Session\Flash\FlashBag;
 
 /**
@@ -16,8 +17,6 @@ define('USERNAME_MAX_LENGTH', 100);
 require_once __DIR__.'/../../../vendor/autoload.php';
 
 try {
-    // Check the PHP version
-    api_check_php_version();
 
     // Get settings from .env.local file created.
     $envFile = __DIR__.'/../../../.env.local';
@@ -29,10 +28,14 @@ try {
     }
 
     $env = $_SERVER['APP_ENV'] ?? 'dev';
-    //Debug::enable();
-    $kernel = new Chamilo\Kernel($env, true);
+    $debug = 'dev' === $env;
+    if ($debug) {
+        Debug::enable();
+    }
+
+    $kernel = new Chamilo\Kernel($env, $debug);
     // Loading Request from Sonata. In order to use Sonata Pages Bundle.
-    $request = \Symfony\Component\HttpFoundation\Request::createFromGlobals();
+    $request = Request::createFromGlobals();
 
     // This 'load_legacy' variable is needed to know that symfony is loaded using old style legacy mode,
     // and not called from a symfony controller from public/
@@ -65,6 +68,7 @@ try {
 
     $container = $kernel->getContainer();
 
+    // Load legacy configuration.php
     if ($kernel->isInstalled()) {
         require_once $kernel->getConfigurationFile();
     } else {
diff --git a/src/CoreBundle/Resources/views/Exception/error.html.twig b/src/CoreBundle/Resources/views/Exception/error.html.twig
index af7019220e..112b5a26c3 100644
--- a/src/CoreBundle/Resources/views/Exception/error.html.twig
+++ b/src/CoreBundle/Resources/views/Exception/error.html.twig
@@ -1,8 +1,15 @@
 {% extends '@ChamiloCore/Layout/base-layout.html.twig' %}
 {% block page_content %}
-    <div class="error-page">
-        <div class="error-content">
-            {{ exception.message }}
-        </div>
+    <div
+        id="app"
+    >
     </div>
+    <section id="sectionMainContent" class="section-content">
+        <div class="jumbotron jumbotron-fluid">
+            <div class="container">
+                <h1 class="display-4">Error</h1>
+                <p class="lead"> {{ exception.message }}</p>
+            </div>
+        </div>
+    </section>
 {% endblock %}