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

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

Failed to import project: Failed to get code from 'http://varnish-cache.org/svn/trunk/varnish-cache//trunk/' (svn checkout): 1