GraphQL Federation- Couldn't load service definitions for

Hi Everyone,

I attempt to use Federation to consolidate all subgraphs.
However, I ran into the problem after hooking up with the first subgraph.
Anything I need to do on my end to make this work and my “https://XXXXX/graphql” is working great.



import { ApolloServer } from 'apollo-server';
import { ApolloServerExpressConfig } from 'apollo-server-express';
const { ApolloGateway,IntrospectAndCompose } = require("@apollo/gateway");

const gateway = new ApolloGateway({
  supergraphSdl: new IntrospectAndCompose({
    subgraphs: [
      { name: 'users', url: 'https://XXXXX/graphql' },
      // ...additional subgraphs...

const url = "http://localhost:5002/"
let config : ApolloServerExpressConfig  =    { gateway: gateway}

const server = new ApolloServer(config);

server.listen().then(({ url }) => {
  console.log(`Server ready at url: ${url}`);

What is the error you receive? What’s the code look like to load your sub-graphs?