Could not import extension sphinx_panels

Question

While trying to use sphinx_panels in the rst (reStructuredText), I'm facing an error Could not import extension sphinx_panels.

I've added the extension in the conf.py file as mentioned in the docs still facing the issue

I even tried reinstalling but no help, can anyone tell me how to resolve the issue

user_4799273 · Answer

Your sphinx version (2.0.1) is too old, SphinxPostTransform is introduced in 2.1.0.

Changelog: https://www.sphinx-doc.org/en/master/changes.html#release-2-1-0-released-jun-02-2019

Add a helper class sphinx.transforms.post_transforms.SphinxPostTransform