You’re updating your WordPress site and go the site health status and a recommended improvement is “Have a default theme available.”

You’re probably getting this because you just got done deleting all of your inactive themes from a previous recommended improvement.

Solution:

1. Click “Manage your themes”
2. Click “Add New”

3. Search “twenty twenty” or “twenty twentyone” just write out the current year in the same format “twenty twenty…”

4. Before you install the theme, make sure the theme was created by WordPress.org

5. Install, and Done.

You now have a default theme fix for your WordPress site’s recommended improvement.