Add missing service definition

DependencyInjection/SuluContentExtension.php

@@ -51,6 +51,7 @@ public function load(array $configs, ContainerBuilder $container): void
         $loader->load('normalizer.xml');
         $loader->load('services.xml');
         $loader->load('form-visitor.xml');
+        $loader->load('controller.xml');
 
         if ($container->hasParameter('kernel.bundles')) {
             // TODO FIXME add test here

Resources/config/controller.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" ?>
+<container xmlns="http://symfony.com/schema/dic/services"
+           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+           xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+    <services>
+        <service id="sulu_content.content_controller"
+                 class="Sulu\Bundle\ContentBundle\Content\UserInterface\Controller\Website\ContentController"
+                 public="true">
+            <tag name="container.service_subscriber" />
+            <tag name="controller.service_arguments" />
+            <tag name="sulu.context" context="website" />
+            <call method="setContainer">
+                <argument type="service" id="Psr\Container\ContainerInterface" />
+            </call>
+        </service>
+
+        <service id="Sulu\Bundle\ContentBundle\Content\UserInterface\Controller\Website\ContentController" alias="sulu_content.content_controller" />
+    </services>
+</container>