diff --git a/sidebars.js b/sidebars.js
index 8edba955928..1d2e849b519 100644
--- a/sidebars.js
+++ b/sidebars.js
@@ -1343,7 +1343,18 @@ const sidebars = {
         "operations/startup-scripts",
         "operations/storing-data",
         "operations/allocation-profiling",
-        "operations/backup",
+        {
+          type: "category",
+          label: "Backup/Restore",
+          collapsed: true,
+          collapsible: true,
+          items: [
+            {
+              type: "autogenerated",
+              dirName: "operations/backup_restore",
+            }
+          ]
+        },
         "operations/caches",
         "operations/workload-scheduling",
         "operations/update",
diff --git a/src/theme/CodeBlock/index.js b/src/theme/CodeBlock/index.js
index b8f76b0c582..eb4f10e7077 100644
--- a/src/theme/CodeBlock/index.js
+++ b/src/theme/CodeBlock/index.js
@@ -4,6 +4,8 @@ import CodeViewer from "../../components/CodeViewer";
 
 
 function countLines(text) {
+  // Handle undefined or null input
+  if (!text) return 1; // Return 1 as default line count
   // Split the string by newline characters
   const lines = text.split('\n');
   // Return the number of lines
@@ -36,7 +38,7 @@ function parseMetaString(meta = '') {
 export default function CodeBlockWrapper(props) {
   const lineHeight = 18.85;
   const [isLoaded, setIsLoaded] = useState(false);
-  const [estimatedHeight, setEstimatedHeight] = useState(countLines(props.children)*lineHeight);
+  const [estimatedHeight, setEstimatedHeight] = useState(countLines(props.children || '') * lineHeight);
   const codeBlockRef = useRef(null);
 
   const handleIntersection = useCallback((entries) => {