The configuration file required to build documentation is missing from your project. Add a configuration file to your project to make it build successfully. Read more at https://docs.readthedocs.io/en/stable/config-file/v2.html

Problem in your project's configuration. No default configuration file found at repository's root. See https://docs.readthedocs.io/en/stable/config-file/

Problem in your project's configuration. Invalid configuration option "build.os": build not found