Adding frontmatter to markdown files results in 404s after building

[nikmartin]

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I added GH Pages to a private repository, and added README.md, CHANGELOG.md, and ROADMAP.md and the pages load fine, but the title in README.md is being repeated int he HTML, using the minima template. Googling the issue, the answer was to add a frontmatter section to the top of the file with a title: element. If I do this, the build completes successfully, but the site just displays a 404 error. As a test, I published the same file with an empty frontmatter header, and I still get a 404.

What am I doing wrong?

[nikmartin]

I have found that if I add 'README.html' to the url it works. Adding frontmatter to the page some how breaks README being used as the default page

[johanf44]

you can also add permalink: /index.html to the frontmatter I noticed