Migrating my existing theme to a block theme?

[crs1138]

I'm trying to asses what it will take to migrate our existing theme to a block theme. I've added a theme.json and created a folder templates with an empty file templates/index.html. File permissions for the directory and the theme file are 755.

My theme.json is very simple:

{
  "$schema": "https://schemas.wp.org/wp/6.0/theme.json",
  "version": 2,
  "settings": {
    "layout": {
      "contentSize": "736px",
      "wideSize": "1040px"
    }
  }
}

I've removed all my existing PHP files (index.php, home.php, header.php, footer.php, even functions.php). When I try to access the Site Editor, I get the following message:

The editor is unable to find a block template for the homepage.

What am I missing? Why does it not work?

[crs1138]

It seem to be related to the Reading settings?

[crs1138]

Silly me. I completely overlooked two empty folders – block-templates and block-template-parts that where hiding in the plain site amongst other folders in the theme I'm migrating. Wordpress was taking these as the source folders for block template and never actually made it into the new folders templates and parts.