diff --git a/DependencyInjection/AvanzuAdminThemeExtension.php b/DependencyInjection/AvanzuAdminThemeExtension.php
index 78787630..96215a29 100644
--- a/DependencyInjection/AvanzuAdminThemeExtension.php
+++ b/DependencyInjection/AvanzuAdminThemeExtension.php
@@ -25,23 +25,25 @@ public function load(array $configs, ContainerBuilder $container)
         $baseConfiguration = new Configuration();
         
         // Load the configuration from files
-        $configs = $container->getExtensionConfig($this->getAlias());
-       
         try
         {
             $config = $this->processConfiguration($baseConfiguration, $configs);
         }
         catch(InvalidConfigurationException $e)
         {
-            echo 'AvanzuAdminBundle: invalid config: ' . $e->getMessage() . PHP_EOL;
-            // Fallback: ignore invalid config from the container user config file and use default values from base configuration
-            $config = $baseConfiguration;
+            // Fallback: ignore invalid config from the container user config file and abort use configuration in load
+            echo 'AvanzuAdminBundle: invalid config (load): ' . $e->getMessage() . PHP_EOL . '    The config options for the bundle AvanzuAdminBundle were skipped';
+            $config = [];
         }
 
-        // Set the parameters from config files
-        $container->setParameter('avanzu_admin_theme.bower_bin', (string) (isset($config['bower_bin']) ? $config['bower_bin'] : ''));
-        $container->setParameter('avanzu_admin_theme.use_twig', (bool) (isset($config['use_twig']) ? $config['use_twig'] : FALSE));
-        $container->setParameter('avanzu_admin_theme.options', (array) (isset($config['options']) ? $config['options'] : []));
+        // Use the config only if it is fully validated from the processed configuration
+        if(!empty($config))
+        {
+            // Set the parameters from config files
+            $container->setParameter('avanzu_admin_theme.bower_bin', (string) (isset($config['bower_bin']) ? $config['bower_bin'] : ''));
+            $container->setParameter('avanzu_admin_theme.use_twig', (bool) (isset($config['use_twig']) ? $config['use_twig'] : FALSE));
+            $container->setParameter('avanzu_admin_theme.options', (array) (isset($config['options']) ? $config['options'] : []));
+        }
 
         // Load the services (with parameters loaded), since twig require theme_manager service
         try
@@ -69,6 +71,8 @@ public function load(array $configs, ContainerBuilder $container)
 
     /**
      * Allow an extension to prepend the extension configurations.
+     * 
+     * @see https://symfony.com/doc/current/bundles/prepend_extension.html
      *
      * @param ContainerBuilder $container
      */
@@ -77,77 +81,61 @@ public function prepend(ContainerBuilder $container)
         $baseConfiguration = new Configuration();
         
         // Load the configuration from files
-        
+
+        // The configuration of AvanzuAdminThemeExtension
         $configs = $container->getExtensionConfig($this->getAlias());
         
         try
         {
+            // use the Configuration class to generate a config array with the config extension
             $config = $this->processConfiguration($baseConfiguration, $configs);
         }
         catch(InvalidConfigurationException $e)
         {
-            // Fallback: ignore invalid config from the container user config file and use default values from base configuration
-            echo 'AvanzuAdminBundle: invalid config: ' . $e->getMessage() . PHP_EOL;
-            $config = $baseConfiguration;
+            // Fallback: ignore invalid config from the container user config file and abort use configuration in prepend
+            echo 'AvanzuAdminBundle: invalid config (prepend): ' . $e->getMessage() . PHP_EOL . '    The config options for the bundle AvanzuAdminBundle were skipped';
+            $config = [];
         }
         
-        // Set the parameters from config files
-        $container->setParameter('avanzu_admin_theme.bower_bin', (string) (isset($config['bower_bin']) ? $config['bower_bin'] : ''));
-        $container->setParameter('avanzu_admin_theme.use_twig', (bool) (isset($config['use_twig']) ? $config['use_twig'] : FALSE));
-        $container->setParameter('avanzu_admin_theme.options', (array) (isset($config['options']) ? $config['options'] : []));
-
-        // Load the services (with parameters loaded), since twig require theme_manager service
-        try
-        {
-            $loader = new Loader\XmlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
-            $loader->load('services.xml');
-        }
-        catch(FileLocatorFileNotFoundException $e) // Symfony 3.3 and 4.x are based in YAML
-        {
-            $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
-            $loader->load('services.yml');
-        }
-        catch(InvalidArgumentException $e) // Symfony 3.3 and 4.x are based in YAML
-        {
-            $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
-            $loader->load('services.yml');
-        }
-        catch(\Exception $e) // Symfony 3.3 and 4.x are based in YAML
+        // Use the config only if it is fully validated from the processed configuration
+        if(!empty($config))
         {
-            $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
-            $loader->load('services.yml');
-            // echo 'AvanzuAdminTheme: ' . $e->getMessage() . PHP_EOL; // Use this for your own debugging
-        }
-
-        $bundles = $container->getParameter('kernel.bundles');
-
-        // Inject in twig global config the theme_manager service
-        if ($config['use_twig'] && isset($bundles['TwigBundle'])) {
-            $container->prependExtensionConfig(
-                'twig',
-                [
-                    'form_theme' => [
-                        'AvanzuAdminThemeBundle:layout:form-theme.html.twig',
-                    ],
-                    'globals' => [
-                        'admin_theme' => '@avanzu_admin_theme.theme_manager',
-                    ],
-                ]
-            );
-        }
-
-        if ($config['use_assetic'] && isset($bundles['AsseticBundle'])) {
-            $assets = include dirname(__FILE__) . '/../Resources/config/assets.php';
-
-            $container->prependExtensionConfig(
-                'assetic',
-                [
-                    'assets' => $assets,
-                    'bundles' => [
-                        'AvanzuAdminThemeBundle',
-                    ],
-                ]
-            );
+            // Set the parameters from config files
+            $container->setParameter('avanzu_admin_theme.bower_bin', (string) (isset($config['bower_bin']) ? $config['bower_bin'] : ''));
+            $container->setParameter('avanzu_admin_theme.use_twig', (bool) (isset($config['use_twig']) ? $config['use_twig'] : FALSE));
+            $container->setParameter('avanzu_admin_theme.options', (array) (isset($config['options']) ? $config['options'] : []));
+    
+            // Get all the bundles
+            $bundles = $container->getParameter('kernel.bundles');
+    
+            // Inject in twig global config the theme_manager service
+            if ($config['use_twig'] && isset($bundles['TwigBundle'])) {
+                $container->prependExtensionConfig(
+                    'twig',
+                    [
+                        'form_theme' => [
+                            'AvanzuAdminThemeBundle:layout:form-theme.html.twig',
+                        ],
+                        'globals' => [
+                            'admin_theme' => '@avanzu_admin_theme.theme_manager',
+                        ],
+                    ]
+                );
+            }
+    
+            if ($config['use_assetic'] && isset($bundles['AsseticBundle'])) {
+                $assets = include dirname(__FILE__) . '/../Resources/config/assets.php';
+    
+                $container->prependExtensionConfig(
+                    'assetic',
+                    [
+                        'assets' => $assets,
+                        'bundles' => [
+                            'AvanzuAdminThemeBundle',
+                        ],
+                    ]
+                );
+            }
         }
     }
 }