Tags app does not show up on the theme editor

Tags app does not show up on the theme editor

There are 2 possible causes

(1) It is not an OS 2.0 theme

We are very sorry about this.

This app cannot be installed in unsupported (non-OS2.0) themes.

(2) It is not a supported template

The tag list is only supported by four templates: Blog Posts, Blog, Products, and Collection.

Please access one of the templates.