Context

No response

Bug description

When adding the built-in blog plugin and writing your first post, spinning up the live preview server will abort with a BuildError (init.py line 73):

Error reading metadata of post 'blog\posts\hello-world.md' in 'docs':
Expected metadata to be defined but found nothing

Including YAML style meta-data in other (not blog) Markdown files will not result in a BuildError.

A minimal reproduction project is included.

Tested with mkdocs-material-9.4.13 and mkdocs-1.5.3.

Related links

• Built-in blog plugin
• Writing your first post

Reproduction

material-mkdocs-blog.zip

Steps to reproduce

1. Add built-in blog plugin
2. Write your first post
3. Spin up the live preview server

Browser

No response

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.