kanhaiya5590-google-tag-manager-issue-if-no-list-block-found.patch

diff --git a/vendor/magento/module-google-tag-manager/Block/ListJson.php b/vendor/magento/module-google-tag-manager/Block/ListJson.php
index 7d1cd51f..21938984 100644
--- a/vendor/magento/module-google-tag-manager/Block/ListJson.php
+++ b/vendor/magento/module-google-tag-manager/Block/ListJson.php
@@ -199,6 +199,9 @@ class ListJson extends \Magento\Framework\View\Element\Template
      */
     protected function _getProductCollection()
     {
+        if(!$this->getListBlock()) { // To check list block exist or not if not then return null
+            return null;
+        }
         /* For catalog list and search results
          * Expects getListBlock as \Magento\Catalog\Block\Product\ListProduct
          */