Extension error: Could not import extension javasphinx (exception: cannot import name 'l_' from 'sphinx.locale'

[Orghaniian]

Details

• Read the Docs project URL: https://readthedocs.org/projects/poo-tp-tp1/
• Build URL (if applicable): https://readthedocs.org/projects/poo-tp-tp1/builds/12280907/
• Read the Docs username (if applicable): Orghaniian

Expected Result

Successful build

Actual Result

build failed

python /home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/bin/sphinx-build -T -E -b readthedocs -d _build/doctrees-readthedocs -D language=en . _build/html

Running Sphinx v3.3.0
loading translations [en]... done

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/site-packages/sphinx/registry.py", line 416, in load_extension
    mod = import_module(extname)
  File "/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/site-packages/javasphinx/__init__.py", line 17, in <module>
    from .domain import JavaDomain
  File "/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/site-packages/javasphinx/domain.py", line 25, in <module>
    from sphinx.locale import l_, _
ImportError: cannot import name 'l_' from 'sphinx.locale' (/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/site-packages/sphinx/locale/__init__.py)

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

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/site-packages/sphinx/cmd/build.py", line 279, in build_main
    args.tags, args.verbosity, args.jobs, args.keep_going)
  File "/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/site-packages/sphinx/application.py", line 245, in __init__
    self.setup_extension(extension)
  File "/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/site-packages/sphinx/application.py", line 402, in setup_extension
    self.registry.load_extension(self, extname)
  File "/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/site-packages/sphinx/registry.py", line 420, in load_extension
    err) from err
sphinx.errors.ExtensionError: Could not import extension javasphinx (exception: cannot import name 'l_' from 'sphinx.locale' (/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/site-packages/sphinx/locale/__init__.py))

Extension error:
Could not import extension javasphinx (exception: cannot import name 'l_' from 'sphinx.locale' (/home/docs/checkouts/readthedocs.org/user_builds/poo-tp-tp1/envs/latest/lib/python3.7/site-packages/sphinx/locale/__init__.py))

I have the same error if I try on my computer

[humitos]

Hi @Orghaniian!

I don't think this error is related to Read the Docs but a misconfiguration with dependencies.

I have the same error if I try on my computer

You should check that the extension is compatible with the version of Sphinx you are using.

[swaldhoer]

Maybe also related to #7663?

[stsewd]

Here the user was able to reproduce the issue locally, so looks like the sphinx version is the problem here. @swaldhoer you can check if you are using the same sphinx version locally to see if you are able to reproduce this outside rtd.