How to Install and Debug a WordPress Developer Theme

1. Log in to your WordPress dashboard and navigate to 'Appearance.' Go to 'Themes' and click 'Install Themes.' Search for 'framework' or 'sandbox' in the search box and browse through the various developer themes available.
2. Click on the theme you want to install and click the 'Install' button. Wait until the 'Themes' screen loads again and click 'Activate' under the new theme's screenshot to activate that theme.

3. Download the wp-config.php file located in your main WordPress directory and open it in a code editor or Notepad. Scroll down until you find 'define('WP_DEBUG', false);' and change 'false' to 'true.' Save the file and re-upload it.
4. Visit your WordPress website and inspect every page for errors. With debugging turned on in WordPress, any errors in your current theme will display messages right on the website. Most error messages come with suggestions and even links to the WordPress Codex, so read them carefully.
5. Go back to the dashboard and navigate to 'Appearance.' Click the 'Editor' link under 'Appearance' to load the 'Edit Themes' screen. Find the template file you need to debug listed under 'Templates' and click on its link to load it in the editor. Make your changes and click the blue 'Update File' button to save your work.