diff -u b/core/modules/system/templates/status-report.html.twig b/core/modules/system/templates/status-report.html.twig
--- b/core/modules/system/templates/status-report.html.twig
+++ b/core/modules/system/templates/status-report.html.twig
@@ -24,7 +24,7 @@
 <table class="system-status-report">
   <tbody>
   {% for group in requirements %}
-    {% for requirement in requirements %}
+    {% for requirement in group.items %}
       <tr class="system-status-report__entry system-status-report__entry--{{ requirement.severity_status }} color-{{ requirement.severity_status }}">
         {% if requirement.severity_status in ['warning', 'error'] %}
           <th class="system-status-report__status-title system-status-report__status-icon system-status-report__status-icon--{{ requirement.severity_status }}">
diff -u b/core/themes/stable/templates/admin/status-report.html.twig b/core/themes/stable/templates/admin/status-report.html.twig
--- b/core/themes/stable/templates/admin/status-report.html.twig
+++ b/core/themes/stable/templates/admin/status-report.html.twig
@@ -24,7 +24,7 @@
 <table class="system-status-report">
   <tbody>
   {% for group in requirements %}
-    {% for requirement in requirements %}
+    {% for requirement in group.items %}
       <tr class="system-status-report__entry system-status-report__entry--{{ requirement.severity_status }} color-{{ requirement.severity_status }}">
         {% if requirement.severity_status in ['warning', 'error'] %}
         <th class="system-status-report__status-title system-status-report__status-icon system-status-report__status-icon--{{ requirement.severity_status }}">
only in patch2:
unchanged:
--- a/core/modules/system/src/Controller/DbUpdateController.php
+++ b/core/modules/system/src/Controller/DbUpdateController.php
@@ -522,7 +522,7 @@ public function requirements($severity, array $requirements, Request $request) {
     $try_again_url = Url::fromUri($request->getUriForPath(''))->setOptions(['query' => $options])->toString(TRUE)->getGeneratedUrl();
 
     $build['status_report'] = array(
-      '#theme' => 'status_report',
+      '#type' => 'status_report',
       '#requirements' => $requirements,
       '#suffix' => $this->t('Check the messages and <a href=":url">try again</a>.', array(':url' => $try_again_url))
     );