Blog issue - TypeError: unsupported operand type(s) for |: 'ABCMeta' and 'NoneType'

[SteveRosam]

Context

I have seen this issue, which is now closed.
(I have tried with Python 3.8 and 3.11)
#6264

Bug description

When I add this to a new docs site (mkdocs + material) I get the error below
Note that i also add a blog folder under docs folder and a posts folder under that.
an index.md goes in the blog folder and a .md file goes in the posts folder.
All per the docs.

plugins:
  - blog

TypeError: unsupported operand type(s) for |: 'ABCMeta' and 'NoneType'

Related links

• Blog plugin

Reproduction

repro files mkdocs-material.zip

Steps to reproduce

Follow the docs and ensure the correct folder structure

Update mkdocs.yml with the blog config

site_name: My site
site_url: https://mydomain.org/mysite

theme:
  name: material

plugins:
  - blog

nav:
  - Home: index.md
  - Blog:
      - blog/index.md
  

same issue whether i have nav in there or not.

Browser

Chrome

Before submitting

• I have read and followed the bug reporting guidelines.
• I have attached links to the documentation, and possibly related issues and discussions.
• I assure that I have removed all customizations before submitting this bug report.
• I have attached a .zip file with a minimal reproduction using the built-in info plugin.

[squidfunk]

Thanks for reporting. Unfortunately, we don't know which version of MkDocs, Material for MkDocs and all other dependencies you are using. This is why we require using the info plugin (as mentioned in our bug reporting guide and this issue template). Thus, please make sure to carefully read and follow our bug reporting guidelines.

My guess is that you're using an outdated version. Closing as not reproducible.