Extension error:
Could not import extension kerneldoc (exception: cannot import name 'AutodocReporter' from 'sphinx.ext.autodoc' (/usr/lib/python3.7/site-packages/sphinx/ext/autodoc/__init__.py))
make[1]: *** [Documentation/Makefile:68: htmldocs] Error 2
make: *** [Makefile:1518: htmldocs] Error 2
==> ERROR: A failure occurred in build().
    Aborting...
Error making: linux-amd-staging-drm-next-git (linux-amd-staging-drm-next-git-headers linux-amd-staging-drm-next-git)