If your WordPress permalinks are broken, or your pages display a Page Not Found (404) error, you can use the steps below to reset the permalinks in WordPress.

Note: You should always backup your site before performing any troubleshooting.

Log in to your WordPress admin area.

Go to Settings -> Permalinks.

Change the permalink structure to Plain.

Click Save Changes.

The URL on your website's pages should display the permalink settings you selected.