Fields is missing in blog content type.

Problem/Motivation

Getting error while adding content in the blog content type because I am not able to select the category field it's not visible in the UI.

Steps to reproduce

1. Install the theme.
2. Add content in blog content type.
3. Add the content
4. Save the node
5. See the error

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes