# Stuck on the GraphQL meets REST, with Apollo Connectors tutorial

**URL:** <https://community.apollographql.com/t/stuck-on-the-graphql-meets-rest-with-apollo-connectors-tutorial/9478>\
**Category:** Other Apollo Topics\
**Tags:** rover\
**Created:** [October 4, 2025, 8:03pm UTC](https://community.apollographql.com/t/stuck-on-the-graphql-meets-rest-with-apollo-connectors-tutorial/9478 "2025-10-04T20:03:17Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![jmsalter77](https://avatars.discourse-cdn.com/v4/letter/j/eada6e/32.png) [@jmsalter77](https://community.apollographql.com/u/jmsalter77)\
**Post date:** [October 4, 2025, 8:03pm UTC](https://community.apollographql.com/t/stuck-on-the-graphql-meets-rest-with-apollo-connectors-tutorial/9478/1 "2025-10-04T20:03:17Z")

</div>

Hi there,

I’m brand new to ApolloGraphQL.

I’m getting the error below. Everything else has gone well with the project setup. I’m a Mac/Linux person, but for various reasons, I have to do this on a Windows machine. I’ve turned off the firewall temporarily, but this error persists. I’m not sure what else to try. Can anyone help?

PS C:\WINDOWS\system32\> rover dev --supergraph-config supergraph.yaml  
what URL is your subgraph running on?: [http://localhost:4000](http://localhost:4000)  
what is the name of this subgraph?: Odyssey Airlock  
error: Error occurred when composing supergraph  
Error resolving subgraphs:  
Unable to resolve subgraphs.  
Odyssey Airlock: Failed to introspect the subgraph “Odyssey Airlock”: Upstream service error: Unexpected(reqwest::Error { kind: Request, url: “[http://localhost:4000/”](http://localhost:4000/%E2%80%9D), source: hyper\_util::client::legacy::Error(Connect, ConnectError(“tcp connect error”, 127.0.0.1:4000, Os { code: 10061, kind: ConnectionRefused, message: “No connection could be made because the target machine actively refused it.” })) })  
error: Composition Events Stream closed before supergraph schema could successfully compose

---

<div class="post-metadata">

**Author:** ![jmsalter77](https://avatars.discourse-cdn.com/v4/letter/j/eada6e/32.png) [@jmsalter77](https://community.apollographql.com/u/jmsalter77)\
**Post date:** [October 13, 2025, 7:29pm UTC](https://community.apollographql.com/t/stuck-on-the-graphql-meets-rest-with-apollo-connectors-tutorial/9478/2 "2025-10-13T19:29:57Z")

</div>

sorted it. I was just rusty in my knowledge, and it has returned.