Cannot query field node on type Query

Does this happen on the 2.1 dev branch also?

No, I have installed the 2.0.0 only.

I'll try re-create your issue locally.

1. Please attach a copy of your config for GraphQL and GraphQL Compose

- graphql_compose.settings.yml
- graphql.graphql_servers.*.yml

Might be some more context within there.

2. Are you using any kind of special cache service? Redis, memcache, null?

3. What version of GraphQL module are you using?

4. Can you try on 2.1-dev and see if the issue persists?

Let me try the 2.1 dev version.