diff --git a/src/plugins/messenger/MessengerPreview/lib/css.ts b/src/plugins/messenger/MessengerPreview/lib/css.ts
index 93241002..a4ec8757 100644
--- a/src/plugins/messenger/MessengerPreview/lib/css.ts
+++ b/src/plugins/messenger/MessengerPreview/lib/css.ts
@@ -1,4 +1,7 @@
 export const getBackgroundImage = (url: string) => {  
+    if (!url)
+        return undefined;
+
     const escapedUrl = url
         // remove line breaks
         .replace(/\n/g, '')