Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
Here is documentation on starting your own theme: https://docs.nodebb.org/development/themes/
If you want to make small style changes, it's best to do it in the custom CSS portion of the ACP, instead of editing the theme files directly.
@julian @gotwf Yes, I have reset it and have it rebuilt. But nothing, I think it's something of the template that is not. Where can I edit the theme?