Error generating supergraph - EOF while parsing a value at line 1 column 0

[vitomanu96]

Description

I have a problem while generating a supergraph from a config yml file.
The rover command return an error: EOF while parsing a value at line 1 column 0

rover supergraph compose --config ./supergraph-config.yaml      
⌛ resolving SDL for subgraphs defined in ./supergraph-config.yaml
🎶 composing supergraph with Federation v2.7.7
error: Output from `/Users/vitomanu/.rover/bin/supergraph-v2.7.7 compose` was malformed.

Caused by:
    0: /Users/vitomanu/.rover/bin/supergraph-v2.7.7 compose output:
    1: EOF while parsing a value at line 1 column 0
        This error was unexpected! Please submit an issue with any relevant details about what you were trying to do: https://github.com/apollographql/rover/issues/new/choose

federation_version: =2.7.7
subgraphs:
  contabilita:
    routing_url: 'http://localhost:8084/graphql'
    schema:
      subgraph_url: 'http://localhost:8084/graphql'
      introspection_headers:
        AuthKey: AuthValue

An example schema.graphql is attached.

Steps to reproduce

Run this command: rover supergraph compose --config ./supergraph-config.yaml (with previous configuration)

Expected result

Should create the supergraph.graphql file.

Actual result

EOF while parsing a value at line 1 column 0

Environment

Rover Info:
Version: 0.23.0
Install Location: /Users/vitomanu/.rover/bin/rover
OS: Mac OS 14.4.1 [64-bit]
Shell: /bin/zsh

schema.graphql.txt