If you're facing issues with the visual editor in WordPress, where it's not working as expected, here are some steps you can take to troubleshoot and resolve the problem:

1. Check for JavaScript Errors:

   • Open your browser's developer console (usually by pressing F12 or right-clicking and selecting "Inspect") and check for any JavaScript errors. These errors can provide clues about what's causing the issue.

2. Clear Browser Cache and Cookies:

   • Cached data in your browser can sometimes interfere with the visual editor. Clear your browser's cache and cookies and try again.

3. Try a Different Browser or Device:

   • There might be a browser-specific issue. Try accessing the editor using a different browser or device to see if the problem persists.

4. Disable Plugins:

   • Deactivate all plugins and check if the visual editor starts working. If it does, reactivate each plugin one by one to identify the conflicting one.

5. Switch to a Default Theme:

   • Temporarily switch to a default WordPress theme (like Twenty Twenty-One) to see if the issue is related to your current theme.

6. Increase PHP Memory Limit:

   • A low PHP memory limit can sometimes lead to issues with the visual editor. Add the following code to your wp-config.php file:
   php

6. define('WP_MEMORY_LIMIT', '256M');

7. Check for ModSecurity Rules:

   • If your server has ModSecurity enabled, it might be blocking certain requests. Contact your hosting provider to review ModSecurity rules.

8. Review Server Logs:

   • Access your server's error logs for any specific information about the issue. This can provide more context on what's causing the problem.

9. Reinstall WordPress Core Files:

   • If none of the above steps work, consider reinstalling the core WordPress files. Make sure to keep a backup of your site before doing this.

10. Check for Content Security Policies (CSP):

    • If your website has a Content Security Policy in place, it might be restricting certain scripts. Check the CSP settings and ensure they're not blocking necessary scripts for the visual editor.

11. Inspect Theme Files and Custom CSS:

    • Review the theme files, particularly the style.css file, for any custom CSS that might be affecting the visual editor.

12. Contact Hosting Support:

    • If you're still unable to resolve the issue, contact your hosting provider's support team. They can review server configurations and logs to identify and resolve the issue.

Remember to always back up your site before making any significant changes. This allows you to revert back if any further issues arise.