unable to use editorial workflow on forked repo

**Describe the bug**

I keep getting this warning

> Failed to load entry: EDITORIAL_WORKFLOW_ERROR: content is not under editorial workflow

And can't view unpublished content, though PRs / branches are created.

Likely related to this issue with very little detail #7025

**To Reproduce**

- Error when saving a new entry
- Unpublished entries not visible under either
- workflows page
- collection page

**Expected behavior**

Can create / view / edit unpublished entries

## Screenshots

Error when accessing workflows page


Branches and PRs have been created on repo


On saving an new entry, redirects to "published" entry with no content


Sometimes entries are show in collection list but with no content


**Applicable Versions: 3.6.3**

```html

Content Manager

```

[view code in context](https://github.com/breathe-easy-events/sheffield.breathe-easy.uk/blob/9287b267dcc4767bbaced6ecd897e1020814c9e7/src/admin/index.html#L1-L13)

**CMS configuration**

```yaml
backend:
name: github
repo: breathe-easy-events/sheffield.breathe-easy.uk
branch: main
site_url: https://sheffield.breathe-easy.uk
media_folder: "src/static/img"
public_folder: "/static/img"
publish_mode: editorial_workflow
collections:
- label: "Home"
name: "home"
folder: "src"
create: false
fields:
- { label: "Title", name: "title", widget: "string" }
- { label: "Body", name: "body", widget: "markdown" }
- label: "Pages"
name: "pages"
folder: "src/pages"
create: true
fields:
- {
label: "Title",
name: "title",
widget: "string",
hint: "This will be converted to a slug eg. 'About Us' to 'about-us' which will be used in the URL",
}
- {
label: "Menu item",
name: "menu",
widget: "boolean",
default: false,
hint: "Should this page be linked to from the navigation at the top of every page?",
}
- {
label: "Discription",
name: "discription",
widget: "text",
hint: "Metadata for previews on social media and search engines, aim for between 50 - 150 characters",
pattern: ["^.{25,200}$", "Must be between 25 and 200 characters"],
required: false,
}
- {
label: "Social image",
name: "socialImage",
hint: "Image for previews on social media and search engines, should be 1200x630px, will be ignored if no alt text is provided",
widget: "image",
choose_url: false,
required: false,
}
- {
label: "Social image alt text",
name: "socialImageAlt",
widget: "text",
hint: "Alt text describing preview image for screen readers",
pattern: ["^.{25,}$", "Must be atleast 25 characters"],
required: false,
}
- { label: "Body", name: "body", widget: "markdown" }
```

[view code in context](https://github.com/breathe-easy-events/sheffield.breathe-easy.uk/blob/9287b267dcc4767bbaced6ecd897e1020814c9e7/src/admin/config.yml#L1-L59)

**Additional Context**

This is a fork of a working installation. I am migrating from the main domain to a sub-domain. I am not sure if that should have any effect.