[www-scripts] Sphinx Doc Update: ERROR

[root via www-scripts]

/opt/tools/sphinx_update.sh: warning: removing stale lock file from PID 15361.
UPDATING lnt SOURCES
HEAD is now at 6034399 [LNT] Pin Python version in Dockerfile to 3.7 temporarily
>From https://github.com/llvm/llvm-lnt
 * branch            master     -> FETCH_HEAD
Current branch master is up to date.
/opt/tools/sphinx_update.sh: line 139: cd: /opt/sphinx-docs/build/lnt: No such file or directory
sphinx-build -b html -d _build/doctrees   . _build/html
Running Sphinx v1.7.6
Warning: Sphinx Bootstrap Theme package is not installed!
making output directory...
loading pickled environment... not yet created
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 11 source files that are out of date
updating environment: 11 added, 0 changed, 0 removed
reading sources... [  9%] api
reading sources... [ 18%] concepts
reading sources... [ 27%] contents
reading sources... [ 36%] developer_guide
reading sources... [ 45%] importing_data
reading sources... [ 54%] intro
reading sources... [ 63%] modules/testing
reading sources... [ 72%] profiles
reading sources... [ 81%] quickstart
reading sources... [ 90%] tests
reading sources... [100%] tools

WARNING: autodoc: failed to import class u'ProfileImpl' from module u'lnt.testing.profile.profile'; the following exception was raised:
No module named future
WARNING: autodoc: failed to import module u'lnt.testing.profile.profilev1impl'; the following exception was raised:
No module named future
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
preparing documents... done
writing output... [  9%] api
writing output... [ 18%] concepts
writing output... [ 27%] contents
writing output... [ 36%] developer_guide
writing output... [ 45%] importing_data
writing output... [ 54%] intro
writing output... [ 63%] modules/testing
writing output... [ 72%] profiles
writing output... [ 81%] quickstart
writing output... [ 90%] tests
writing output... [100%] tools

generating indices... genindex py-modindex
writing additional pages... index search
copying static files... done
copying extra files... done
dumping search index in English (code: en) ... done
dumping object inventory... done
build succeeded, 2 warnings.

The HTML pages are in _build/html.

Build finished. The HTML pages are in _build/html.
Copying build to /opt/sphinx-docs/web/lnt
sending incremental file list
rsync: change_dir "/opt/sphinx-docs/build/lnt/docs/_build/html" failed: No such file or directory (2)

sent 20 bytes  received 12 bytes  64.00 bytes/sec
total size is 0  speedup is 0.00
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1183) [sender=3.1.0]