diff --git a/config/optional/localgov_menu_link_group.localgov_menu_link_group.localgov_menu_link_group_guide.yml b/config/optional/localgov_menu_link_group.localgov_menu_link_group.localgov_menu_link_group_guide.yml
index 972f2e6..d3fe254 100644
--- a/config/optional/localgov_menu_link_group.localgov_menu_link_group.localgov_menu_link_group_guide.yml
+++ b/config/optional/localgov_menu_link_group.localgov_menu_link_group.localgov_menu_link_group_guide.yml
@@ -3,8 +3,8 @@ status: true
 dependencies:
   enforced:
     module:
-    - localgov_guides
-    - localgov_menu_link_group
+      - localgov_guides
+      - localgov_menu_link_group
 id: localgov_menu_link_group_guide
 group_label: Guide
 weight: 0
diff --git a/localgov_guides.module b/localgov_guides.module
index c0ac468..41b13c2 100644
--- a/localgov_guides.module
+++ b/localgov_guides.module
@@ -208,7 +208,7 @@ function localgov_guides_preprocess_node__localgov_guides_overview__full(&$vars)
 
   if ($guide_overview_node->hasField('localgov_guides_section_title') && !$guide_overview_node->localgov_guides_section_title->isEmpty()) {
     $guide_overview_title = $guide_overview_node->localgov_guides_section_title->value;
-  };
+  }
 
   $vars['guide_overview_title'] = $guide_overview_title ?: $guide_overview_default_title;
 }
diff --git a/src/EventSubscriber/PageHeaderSubscriber.php b/src/EventSubscriber/PageHeaderSubscriber.php
index 5a900d8..c382155 100644
--- a/src/EventSubscriber/PageHeaderSubscriber.php
+++ b/src/EventSubscriber/PageHeaderSubscriber.php
@@ -27,7 +27,7 @@ public function __construct(protected EntityRepositoryInterface $entityRepositor
   /**
    * {@inheritdoc}
    */
-  public static function getSubscribedEvents() {
+  public static function getSubscribedEvents(): array {
     return [
       PageHeaderDisplayEvent::EVENT_NAME => ['setPageHeader', 0],
     ];
diff --git a/src/Plugin/PreviewLinkAutopopulate/Guides.php b/src/Plugin/PreviewLinkAutopopulate/Guides.php
index ffe194d..07aed57 100644
--- a/src/Plugin/PreviewLinkAutopopulate/Guides.php
+++ b/src/Plugin/PreviewLinkAutopopulate/Guides.php
@@ -26,6 +26,7 @@ class Guides extends PreviewLinkAutopopulatePluginBase {
    * {@inheritdoc}
    */
   public function getPreviewEntities(): array {
+    $overview = NULL;
     $guide_nodes = [];
 
     // Find guide overview.
@@ -36,13 +37,16 @@ public function getPreviewEntities(): array {
     elseif ($node->bundle() == 'localgov_guides_page') {
       $overview = $node->get('localgov_guides_parent')->entity;
     }
-    $guide_nodes[] = $overview;
 
-    // Find guide pages.
-    $guide_pages = $overview->get('localgov_guides_pages')->referencedEntities();
-    foreach ($guide_pages as $guide_page) {
-      if ($guide_page instanceof NodeInterface && $guide_page->access('view')) {
-        $guide_nodes[] = $guide_page;
+    if ($overview instanceof NodeInterface) {
+      $guide_nodes[] = $overview;
+
+      // Find guide pages.
+      $guide_pages = $overview->get('localgov_guides_pages')->referencedEntities();
+      foreach ($guide_pages as $guide_page) {
+        if ($guide_page instanceof NodeInterface && $guide_page->access('view')) {
+          $guide_nodes[] = $guide_page;
+        }
       }
     }