To fix the “404 Page Not Found” error in WordPress, you can follow these simple steps:

1. Check the Permalink Settings: Go to your WordPress dashboard, navigate to Settings -> Permalinks. Without making any changes, click the “Save Changes” button. This action refreshes the permalink structure and can resolve any issues related to incorrect URL configurations.

2. Verify the Page/Post Existence: Ensure that the page or post you are trying to access actually exists. Double-check the spelling of the URL or try accessing the page from the backend to ensure it is published and accessible.

3. Flush Rewrite Rules: Sometimes, the rewrite rules in WordPress may not be updated correctly, resulting in the 404 error. To fix this, you can flush the rewrite rules. You can do this by installing and activating a plugin like “Flush Rewrite Rules” or by adding a simple code snippet to your theme’s functions.php file.

4. Disable Caching Plugins: If you are using any caching plugins, temporarily disable them and check if the error persists. Caching plugins may sometimes cause conflicts or serve outdated content, resulting in a 404 error.

5. Check for .htaccess File Issues: The .htaccess file in the root directory of your WordPress installation is responsible for managing URL rewriting. Backup your .htaccess file and then try replacing it with a default WordPress .htaccess file. If you don’t have one, you can find it on the WordPress Codex website.

6. Regenerate Permalinks: If none of the above steps work, you can try regenerating the permalinks using a plugin like “Regenerate Permalinks” or by using the built-in “Regenerate Thumbnails” functionality. This process can fix issues related to broken or missing permalinks.

Remember to take appropriate precautions, such as backing up your website, before making any changes to your WordPress installation.