diff --git a/panel/chat/message.py b/panel/chat/message.py
index 229c6f3a22..bb93b0d8f3 100644
--- a/panel/chat/message.py
+++ b/panel/chat/message.py
@@ -222,7 +222,7 @@ def __init__(self, object=None, **params):
             tz = params.get("timestamp_tz")
             if tz is not None:
                 tz = ZoneInfo(tz)
-            elif state.browser_info.timezone:
+            elif state.browser_info and state.browser_info.timezone:
                 tz = ZoneInfo(state.browser_info.timezone)
             params["timestamp"] = datetime.datetime.now(tz=tz)
         reaction_icons = params.get("reaction_icons", {"favorite": "heart"})