diff --git a/packages/livechat/src/lib/main.js b/packages/livechat/src/lib/main.js
index 413243505890..4f985c33113f 100644
--- a/packages/livechat/src/lib/main.js
+++ b/packages/livechat/src/lib/main.js
@@ -83,7 +83,7 @@ export const getLastReadMessage = () => {
 		: renderedMessages
 				.slice()
 				.reverse()
-				.find((item) => item.u._id === user._id);
+				.find((item) => item.u._id === user?._id);
 };
 
 export const getUnreadMessages = () => {
@@ -95,7 +95,7 @@ export const getUnreadMessages = () => {
 		: renderedMessages
 				.slice()
 				.reverse()
-				.findIndex((item) => item.u._id === user._id);
+				.findIndex((item) => item.u._id === user?._id);
 
 	if (lastReadMessageIndex !== -1) {
 		const unreadMessages = renderedMessages.slice(lastReadMessageIndex + 1).filter((message) => message.u._id !== user._id);