Pelican 4.9+ does not copy single image - all others copy as expected

• I have read the Filing Issues and subsequent “How to Get Help” sections of the documentation.

• I can reproduce this problem with stock/default settings file, theme, and sample content (as described in above “How to Get Help” sections of the documentation).

• I have searched the issues (including closed ones) and believe that this is not a duplicate.

• OS version and name: GitHub Pages

• Python version: 3.10

• Pelican version: 4.9+

• Link to theme: Modified Version of Flex Theme

• Links to plugins: ["series", "extract_toc", "neighbors", "keyboard", "extended_sitemap"]

• Link to your site: https://andrewwegner.com/ (CURRENTLY RUNNING 4.8 DUE TO THIS BUG)

• Link to your source: https://github.com/AWegnerGitHub/awegnergithub.github.io-content

• Link to a Gist with the contents of your settings file:

Issue

Pelican 4.9, 4.10 and 4.11 all report this error with a single image:

 WARNING A problem occurred copying file log.py:89
/home/runner/work/awegnergithub.github.io-content/awegnergithub.github.io-content/source/content/images/wegner_headshot.png to /home/runner/work/awegnergithub.github.io-content/awegnergithub.github.io-content/source/output/images; [Errno 21] Is a directory:
'/home/runner/work/awegnergithub.github.io-content/awegnergithub.github.io-content/source/output/images'

And fails to copy the image as expected.

In Pelican 4.8, this image is copied and loads as expected.

GitHub Actions Logs: https://github.com/AWegnerGitHub/awegnergithub.github.io-content/actions/runs/14296901644/job/40065265606

• Build 1 is Pelican 4.11 (upgrade from 4.8 attempt - Headshot does not load on final build)
• Build 2 is Pelican 4.8 (revert to 4.8 - Headshot loads as expected again)
• Build 3 (I don't remember what version this is - Does not work)
• Build 4 (Pelican 4.9 - Same result, headshot image does not load)
• Build 5 (Final revert to 4.8 to ensure the headshot loads on live page)

In the builds that failed, I did not see any other missing images during checks.

Full build script: https://github.com/AWegnerGitHub/awegnergithub.github.io-content/blob/master/.github/workflows/deploy.yml (No changes to this script in 9 months)

Builds are triggered on push to the -content repo. It pulls in the -source and finally pushes the final build to the GitHub pages repo.