diff --git a/build/src/start/server/serverLogLikeMetro.js b/build/src/start/server/serverLogLikeMetro.js
index b1f633512f0dea3203d1f1acd89edefe02cc30d5..34ed7d1d389ff51c9e08e743c79bd84782d7953d 100644
--- a/build/src/start/server/serverLogLikeMetro.js
+++ b/build/src/start/server/serverLogLikeMetro.js
@@ -176,8 +176,15 @@ async function maybeSymbolicateAndFormatJSErrorStackLogAsync(projectRoot, level,
         stack: ((_log_symbolicated = log.symbolicated) == null ? void 0 : (_log_symbolicated_stack = _log_symbolicated.stack) == null ? void 0 : _log_symbolicated_stack.stack) ?? [],
         codeFrame: log.codeFrame
     });
-    // NOTE: Message is printed above stack by the default Metro logic. So we don't need to include it here.
-    const symbolicatedErrorStackLog = `\n\n${formatted.stack}`;
+    /*
+     * The original code assumed the message is printed above the stack by the default Metro
+     * logic and returned only the formatted stack. That only holds when the message and stack
+     * arrive as separate console arguments. React 19 owner-stack errors arrive as ONE merged
+     * string ("<message>\n    at ..."), so the caller replaces the whole argument with this
+     * return value and the message was silently dropped (terminal showed a blank "Web ERROR").
+     * Prepend the parsed message when present so it is never lost.
+     */
+    const symbolicatedErrorStackLog = error.message ? `${error.message}\n\n${formatted.stack}` : `\n\n${formatted.stack}`;
     return {
         isFallback: formatted.isFallback,
         stack: symbolicatedErrorStackLog