Duplicated build.

We encountered a problem with a command while building your project. To resolve this error, double check your project configuration and installed dependencies are correct and have not changed recently.

Some files were detected in an unsupported output path, '_build/html'. Ensure your project is configured to use the output path '$READTHEDOCS_OUTPUT/html' instead.

We encountered a problem with a command while building your project. To resolve this error, double check your project configuration and installed dependencies are correct and have not changed recently.

We encountered a problem with a command while building your project. To resolve this error, double check your project configuration and installed dependencies are correct and have not changed recently.