diff --git a/functions.php b/functions.php
index 4781aeaa3c..128435744b 100644
--- a/functions.php
+++ b/functions.php
@@ -414,7 +414,9 @@ function render_navigation_block(array $attributes): string
     // For parent pages, get the previous and next siblings in the menu order
     $output = '';
     $siblings = array_filter($menu_items, function ($item) use ($nav_menu_item) {
-        return $item->menu_item_parent === $nav_menu_item->menu_item_parent;
+        return $item !== null
+            && $nav_menu_item !== null
+            && $item->menu_item_parent === $nav_menu_item->menu_item_parent;
     });
 
     $siblings = array_values($siblings);
@@ -435,7 +437,7 @@ function render_navigation_block(array $attributes): string
     // For child pages, only show link to the parent
     if ($submenu_page->menu_item_parent !== 0) {
         $parent_item = array_filter($menu_items, function ($item) use ($submenu_page) {
-            return (int) $item->ID === (int) $submenu_page->menu_item_parent;
+            return $submenu_page !== null && (int) $item->ID === (int) $submenu_page->menu_item_parent;
         });
 
         $parent_item = reset($parent_item);
diff --git a/src/GravityFormsExtensions.php b/src/GravityFormsExtensions.php
index 947daa9248..9c27bd1149 100644
--- a/src/GravityFormsExtensions.php
+++ b/src/GravityFormsExtensions.php
@@ -676,11 +676,11 @@ public function p4_gf_clear_page_caches(array $form, bool $is_new = false): void
     /**
      * Client side dynamic population of form fields
      *
-     * @param array $form The different form fields present
+     * @param array|bool $form The different form fields present
      *
      * @return mixed
      */
-    public function p4_client_side_gravityforms_prefill(array $form): array
+    public function p4_client_side_gravityforms_prefill($form): array
     {
         $supported_field_types = ['GF_Field_Hidden'];
 
diff --git a/src/Migrations/M032MigrateSplit2ColumnBlock.php b/src/Migrations/M032MigrateSplit2ColumnBlock.php
index b3219f5164..7633dfc844 100644
--- a/src/Migrations/M032MigrateSplit2ColumnBlock.php
+++ b/src/Migrations/M032MigrateSplit2ColumnBlock.php
@@ -222,9 +222,9 @@ private static function get_split_2_columns_block_attrs(array $block): array
         $block_attrs['column1']['title'] = $block['title'] ?? '';
         $block_attrs['column1']['description'] = wp_trim_words($block['issue_description'] ?? '', 12);
         $block_attrs['column1']['link_text'] = $block['issue_link_text'] ?? '';
-        $block_attrs['column1']['link_path'] = $block['issue_link_path'] ?? '';
+        $block_attrs['column1']['link_path'] = (string)$block['issue_link_path'] ?? '';
         $block_attrs['column1']['image_id'] = $block['issue_image_id'] ?? '';
-        $block_attrs['column1']['image_src'] = $block['issue_image_src'] ?? '';
+        $block_attrs['column1']['image_src'] = (string)$block['issue_image_src'] ?? '';
 
         $block_attrs['column2']['title'] = $block['tag_name'] ?? '';
         $block_attrs['column2']['description'] = wp_trim_words($block['tag_description'] ?? '', 12);
@@ -232,7 +232,7 @@ private static function get_split_2_columns_block_attrs(array $block): array
         $block_attrs['column2']['button_link'] = $block['button_link'] ?? '';
         $block_attrs['column2']['link_path'] = $block['tag_link'] ?? '';
         $block_attrs['column2']['image_id'] = $block['tag_image_id'] ?? '';
-        $block_attrs['column2']['image_src'] = $block['tag_image_src'] ?? '';
+        $block_attrs['column2']['image_src'] = (string)$block['tag_image_src'] ?? '';
 
         return $block_attrs;
     }
diff --git a/tag.php b/tag.php
index 30b56973f7..2fdbfbcea7 100644
--- a/tag.php
+++ b/tag.php
@@ -20,11 +20,11 @@
 }
 
 $tag = get_queried_object();
-$redirect_id = get_term_meta($tag->term_id, 'redirect_page', true);
+$redirect_id = $tag !== null && get_term_meta($tag->term_id, 'redirect_page', true);
+$redirect_page = get_post($redirect_id);
 
-if ($redirect_id) {
+if ($redirect_page) {
     global $wp_query;
-    $redirect_page = get_post($redirect_id);
     $wp_query->queried_object = $redirect_page;
     $wp_query->queried_object_id = $redirect_page->ID;