MkDocs build fails, AttributeError: module 'jinja2' has no attribute 'contextfilter'

[KanchiMoe]

Details

• Read the Docs project URL: https://readthedocs.org/projects/rtd-test-310322/
• Build URL (if applicable): https://readthedocs.org/projects/rtd-test-310322/builds/16519341/
• Read the Docs username (if applicable): https://readthedocs.org/profiles/KanchiMoe/

Expected Result

Build should succeed, using the bare minimum configuration for an MkDocs documentation site.

Build has worked previously in the past (2 weeks ago) using the same configuration.

Actual Result

Build using MkDocs fails.

Build logs:

Traceback (most recent call last):
  File "/home/docs/.pyenv/versions/3.7.9/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/docs/.pyenv/versions/3.7.9/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/docs/checkouts/readthedocs.org/user_builds/rtd-test-310322/envs/latest/lib/python3.7/site-packages/mkdocs/__main__.py", line 14, in <module>
    from mkdocs import config
  File "/home/docs/checkouts/readthedocs.org/user_builds/rtd-test-310322/envs/latest/lib/python3.7/site-packages/mkdocs/config/__init__.py", line 2, in <module>
    from mkdocs.config.defaults import DEFAULT_SCHEMA
  File "/home/docs/checkouts/readthedocs.org/user_builds/rtd-test-310322/envs/latest/lib/python3.7/site-packages/mkdocs/config/defaults.py", line 4, in <module>
    from mkdocs.config import config_options
  File "/home/docs/checkouts/readthedocs.org/user_builds/rtd-test-310322/envs/latest/lib/python3.7/site-packages/mkdocs/config/config_options.py", line 8, in <module>
    from mkdocs import utils, theme, plugins
  File "/home/docs/checkouts/readthedocs.org/user_builds/rtd-test-310322/envs/latest/lib/python3.7/site-packages/mkdocs/theme.py", line 9, in <module>
    from mkdocs.utils import filters
  File "/home/docs/checkouts/readthedocs.org/user_builds/rtd-test-310322/envs/latest/lib/python3.7/site-packages/mkdocs/utils/filters.py", line 11, in <module>
    @jinja2.contextfilter
AttributeError: module 'jinja2' has no attribute 'contextfilter'

This seems related to #9052 (and maybe pallets/jinja/pull/1544) when doing a search on this repo for contextfilter.

Some project settings:

• Repository type: git
• Programming Language: python
• Documentation type: Mkdocs
• Python Interpreter: CPython 3.x

This does not appear to impact Sphinx.

[stsewd]

Hi, this is a problem with your dependencies, you need to pin Jinja2 or update your mkdocs version. mkdocs/mkdocs#2799 https://twitter.com/readthedocs/status/1507388916013314048

[BurtHarris]

I'm seeing this same message after just having installed Docker on Win11 and running the Tutorial. I recognize this is not the Docker repository, but it is the place that a Bing search for the error message turns up first.

For anyone else, it seems the place to look if you are running Docker is
https://forums.docker.com/t/jinja-mkdocs-issue-breaks-docker101tutorial/122671

The workaround documented there worked for me.