Changing CacheableResponse back to Response because of caching problems.

src/Batch.php

@@ -52,7 +52,9 @@ class Batch {
       case 'form':
         break;
       case 'drush':
+      case 'cron':
         print $this->batch['init_message'] . "\r\n";
+//        drush_log($this->batch['init_message']);
         $this->batch =& batch_get();
         $this->batch['progressive'] = FALSE;
         if (function_exists('drush_backend_batch_process'))
@@ -60,11 +62,6 @@ class Batch {
         else
           batch_process();
         break;
-      case 'cron':
-        $this->batch =& batch_get();
-        $this->batch['progressive'] = FALSE;
-        batch_process();
-        break;
     }
   }
 
@@ -120,7 +117,7 @@ class Batch {
    *
    * @see https://api.drupal.org/api/drupal/core!includes!form.inc/group/batch/8
    */
-  static function generate_bundle_urls($query, $info, $batch_info, &$context) {
+  public static function generate_bundle_urls($query, $info, $batch_info, &$context) {
     $languages = \Drupal::languageManager()->getLanguages();
     $default_language_id = Simplesitemap::get_default_lang_id();
 

src/Controller/SimplesitemapController.php

@@ -6,7 +6,7 @@
 
 namespace Drupal\simple_sitemap\Controller;
 
-use Drupal\Core\Cache\CacheableResponse;
+//use Drupal\Core\Cache\CacheableResponse;
 use Symfony\Component\HttpFoundation\Response;
 use Drupal\simple_sitemap\Simplesitemap;
 
@@ -29,6 +29,7 @@ class SimplesitemapController {
     $output = $sitemap->get_sitemap($sitemap_id);
 
     // Display sitemap with correct xml header.
-    return new CacheableResponse($output, Response::HTTP_OK, array('content-type' => 'application/xml'));
+//    return new CacheableResponse($output, Response::HTTP_OK, array('content-type' => 'application/xml'));
+    return new Response($output, Response::HTTP_OK, array('content-type' => 'application/xml'));
   }
 }