Update app.py

app.py

@@ -239,7 +239,8 @@ async def github_webhook(
     print(f"\n--- Starting New Graph Execution with thread_id: {new_thread_id} ---")
 
     if not global_graph:
-        return (f"Error: Graph not initialized. Check server logs.")
+        print("Error: Graph not initialized. Check server logs.")
+        return
 
     initial_state_data = {
     "pr_id": pr_id,