fix (adding return response)

mcp_server.py

@@ -8,6 +8,7 @@ from mcp.server.sse import SseServerTransport
 from starlette.applications import Starlette
 from starlette.routing import Route, Mount
 from starlette.requests import Request
+from starlette.responses import Response
 
 import sys
 import os
@@ -111,14 +112,13 @@ def create_sse_app():
                 write_stream,
                 mcp._mcp_server.create_initialization_options(),
             )
+        return response
     
     return Starlette(
         debug=True,
         routes=[
             Route("/sse", endpoint=handle_sse),
-            # Mount("/messages/", app=sse_transport.handle_post_message),
-            Mount("/messages", app=sse_transport.handle_post_message),
-
+            Mount("/messages/", app=sse_transport.handle_post_message),
         ],
     )