Recoverable error occurred (Non-whitespace before first tag

Serverless Framework
2

Ok, I solved it. The services in the docker-compose of Localstack MUST include cloudformation, completely missed that.
Adding cloudformation at the end of the SERVICES variable, the creation of the stack was successful.


  localstack:
    image: localstack/localstack-full
    ports:
      - "4566:4566"
      - "${PORT_WEB_UI-8080}:${PORT_WEB_UI-8080}"
    environment:
      - SERVICES=s3,lambda,sts,secretsmanager,iam,cloudwatch,sns,cloudformation