[www-scripts] Sphinx Doc Update: ERROR

[www-data via www-scripts]

/opt/tools/sphinx_update.sh: warning: removing stale lock file from PID 18860.
UPDATING llvm SOURCES
Updating '.':
U    docs/LangRef.rst
Updated to revision 338981.
Generating html Sphinx documentation for llvm into "/opt/sphinx-docs/build/llvm/docs/html"
/opt/venv/sphinx/local/lib/python2.7/site-packages/sphinx/util/requests.py:64: UserWarning: Some links may return broken results due to being unable to check the Server Name Indication (SNI) in the returned SSL cert against the hostname in the url requested. Recommended to install "requests[security]" as a dependency or upgrade to a python version with SNI support (Python 3 and Python 2.7.9+).
  'Some links may return broken results due to being unable to '

Extension error:
Could not import recommonmark.parser (needed for source parser) (exception: No module named recommonmark.parser)
make[3]: *** [docs/CMakeFiles/docs-llvm-html] Error 1
make[2]: *** [docs/CMakeFiles/docs-llvm-html.dir/all] Error 2
make[1]: *** [docs/CMakeFiles/docs-llvm-html.dir/rule] Error 2
make: *** [docs/CMakeFiles/docs-llvm-html.dir/rule] Error 2