Docs build failing

[lwasser]

just looking and noticed that the docs started failing i think here with this update of sphinx. We could try to roll back the sphinx version to see if it fixes it as this theme did used to work just fine. note it's running sphinx v4 vs v3.

Running Sphinx v4.0.1
loading translations [en]... done
making output directory... done
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 34 source files that are out of date
updating environment: [new config] 34 added, 0 changed, 0 removed
reading sources... [  2%] api
reading sources... [  5%] api/abcclassroom
reading sources... [  8%] api/abcclassroom.clone
reading sources... [ 11%] api/abcclassroom.config
reading sources... [ 14%] api/abcclassroom.distribute
reading sources... [ 17%] api/abcclassroom.feedback
reading sources... [ 20%] api/abcclassroom.github
reading sources... [ 23%] api/abcclassroom.notebook
reading sources... [ 26%] api/abcclassroom.ok
reading sources... [ 29%] api/abcclassroom.quickstart
reading sources... [ 32%] api/abcclassroom.roster
reading sources... [ 35%] api/abcclassroom.scrub_feedback
reading sources... [ 38%] api/abcclassroom.template
reading sources... [ 41%] api/abcclassroom.utils
reading sources... [ 44%] change-log
reading sources... [ 47%] collect-grade-assignments/clone
reading sources... [ 50%] collect-grade-assignments/feedback
reading sources... [ 52%] collect-grade-assignments/index
reading sources... [ 55%] collect-grade-assignments/roster
reading sources... [ 58%] contributing/code-of-conduct
reading sources... [ 61%] contributing/contributing
reading sources... [ 64%] contributing/index
reading sources... [ 67%] contributing/previous-functionality
reading sources... [ 70%] get-started/classroom-roster
reading sources... [ 73%] get-started/configuration
reading sources... [ 76%] get-started/create-course
reading sources... [ 79%] get-started/get-started
reading sources... [ 82%] get-started/index
reading sources... [ 85%] get-started/overview
reading sources... [ 88%] index
reading sources... [ 91%] manage-assignments/course-materials
reading sources... [ 94%] manage-assignments/create-grade-assignment-workflow
reading sources... [ 97%] manage-assignments/index
reading sources... [100%] manage-assignments/new_assignment

looking for now-outdated files... none found
pickling environment... done
checking consistency... done
preparing documents... done
writing output... [  2%] api
writing output... [  5%] api/abcclassroom
writing output... [  8%] api/abcclassroom.clone
writing output... [ 11%] api/abcclassroom.config
writing output... [ 14%] api/abcclassroom.distribute
writing output... [ 17%] api/abcclassroom.feedback
writing output... [ 20%] api/abcclassroom.github
writing output... [ 23%] api/abcclassroom.notebook
writing output... [ 26%] api/abcclassroom.ok
writing output... [ 29%] api/abcclassroom.quickstart
writing output... [ 32%] api/abcclassroom.roster
writing output... [ 35%] api/abcclassroom.scrub_feedback
writing output... [ 38%] api/abcclassroom.template
writing output... [ 41%] api/abcclassroom.utils
writing output... [ 44%] change-log
writing output... [ 47%] collect-grade-assignments/clone
writing output... [ 50%] collect-grade-assignments/feedback
writing output... [ 52%] collect-grade-assignments/index
writing output... [ 55%] collect-grade-assignments/roster
writing output... [ 58%] contributing/code-of-conduct
writing output... [ 61%] contributing/contributing
writing output... [ 64%] contributing/index
writing output... [ 67%] contributing/previous-functionality
writing output... [ 70%] get-started/classroom-roster
writing output... [ 73%] get-started/configuration
writing output... [ 76%] get-started/create-course
writing output... [ 79%] get-started/get-started
writing output... [ 82%] get-started/index
writing output... [ 85%] get-started/overview
writing output... [ 88%] index
writing output... [ 91%] manage-assignments/course-materials
writing output... [ 94%] manage-assignments/create-grade-assignment-workflow
writing output... [ 97%] manage-assignments/index
writing output... [100%] manage-assignments/new_assignment

generating indices... genindex failed

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/builders/html/__init__.py", line 1044, in handle_page
    output = self.templates.render(templatename, ctx)
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/readthedocs_ext/readthedocs.py", line 185, in rtd_render
    content = old_render(template, render_context)
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/jinja2glue.py", line 191, in render
    return self.environment.get_template(template).render(context)
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/jinja2/environment.py", line 1289, in render
    self.environment.handle_exception()
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/jinja2/environment.py", line 924, in handle_exception
    raise rewrite_traceback_stack(source=source)
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/themes/basic/genindex.html", line 28, in top-level template code
    {{ firstname|e }}
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/pydata_sphinx_theme/layout.html", line 10, in top-level template code
    <a class='right-next' id="next-link" href="{{ next.link|e }}" title="{{ _('next page')}}">{{ next_title or next.title }}</a>
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/themes/basic/../basic/layout.html", line 169, in top-level template code
    {%- block content %}
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/pydata_sphinx_theme/layout.html", line 55, in block 'content'
    {% block docs_toc %}
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/pydata_sphinx_theme/layout.html", line 57, in block 'docs_toc'
    {% if not (meta is not none and 'notoc' in meta) %}
jinja2.exceptions.UndefinedError: 'meta' is undefined

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/cmd/build.py", line 280, in build_main
    app.build(args.force_all, filenames)
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/application.py", line 350, in build
    self.builder.build_update()
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/builders/__init__.py", line 294, in build_update
    len(to_build))
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/builders/__init__.py", line 359, in build
    self.finish()
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/builders/html/__init__.py", line 631, in finish
    self.finish_tasks.add_task(self.gen_indices)
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/util/parallel.py", line 49, in add_task
    res = task_func()
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/util/__init__.py", line 530, in wrapper
    return f(*args, **kwargs)
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/builders/html/__init__.py", line 647, in gen_indices
    self.write_genindex()
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/builders/html/__init__.py", line 703, in write_genindex
    self.handle_page('genindex', genindexcontext, 'genindex.html')
  File "/home/docs/checkouts/readthedocs.org/user_builds/abc-classroom/envs/latest/lib/python3.7/site-packages/sphinx/builders/html/__init__.py", line 1052, in handle_page
    (pagename, exc)) from exc
sphinx.errors.ThemeError: An error happened in rendering the page genindex.
Reason: UndefinedError("'meta' is undefined")

Theme error:
An error happened in rendering the page genindex.
Reason: UndefinedError("'meta' is undefined")

[lwasser]

fixed!! closing this