When you run the graphcdn push command we immediately validate your configuration file to ensure it is correctly formatted.

However, the validation error messages were not as helpful as they should be. We have overhauled them in the latest release of the CLI (v0.4.3) to make sure they precisely explain the issue(s):

$ graphcdn push
Error:  Invalid graphcdn.yml:
- schema: Required
- defaultCacheControl.scope: Expected string, received number

Install the latest version of the CLI by running the npm install graphcdn@latest command in your project's directory.