Error for malformed servicex.yaml file is not very informative

[gordonwatts]

If you have a validation error in a servicex.yaml file, you get a huge stack dump with ends with:

ValidationError: 1 validation error for Configuration
  Input should be a valid dictionary or instance of Configuration [type=model_type, input_value=[{'junk': 'this'}], input_type=list]
    For further information visit https://errors.pydantic.dev/2.10/v/model_type

which is not helpful to point you to what file, etc., generated the error.