Blog posts can't be edited with Storage Format Editor

When opening a blog post with the Storage Format Editor an error is displayed.

Steps to reproduce

1. Create a Blog post and publish the content

2. Navigate to the page tools menu (•••) for the blog post and select Apps > Edit Storage Format

Expected result: The contents is editable with the Storage Format Editor app

Actual result: The contents is not editable and the following error is displayed:

No supported format found. No supported format was found for the selected content. This usually happens when trying to open custom content that is not using storage format or ADF internally. Failed to fetch content for page!