#3 data processor returns a big error upon installation

Civi/DataProcessor/Output/UIOutputHelper.php

@@ -24,6 +24,12 @@ class UIOutputHelper {
    */
   public static function alterMenu(&$items) {
     $factory = dataprocessor_get_factory();
+    // Check whether the factory exists. Usually just after
+    // installation the factory does not exists but then no
+    // outputs exists either. So we can safely return this function.
+    if (!$factory) {
+      return;
+    }
 
     $sql = "
     SELECT o.permission, p.id, p.title, o.configuration, o.type, o.id as output_id 

dataprocessor.php

@@ -10,7 +10,11 @@ use \Symfony\Component\DependencyInjection\Definition;
  * @return \Civi\DataProcessor\Factory
  */
 function dataprocessor_get_factory() {
-  return \Civi::service('data_processor_factory');
+  $container = \Civi::container();
+  if ($container->has('data_processor_factory')) {
+    return \Civi::service('data_processor_factory');
+  }
+  return null;
 }
 
 /**