Wordpress uses permalinks to connect URL’s to individual pages and posts. These can stop working when a update is made, when installing plugins, or when migrating the website. When this happens the home page will load but the the links or tabs to other pages on the website will return a error. Resetting the permalinks will fix the problem. To do so, follow the steps below.
Log in to your Wordpress admin dashboard. You can use YourDomain.com/wp-admin or YourDomain.com/wp-login.php to reach the login.
Select the Settings tab in the left navigation menu. Choose "Permalinks."
Record the current permalink setting being used. If using a Custom Structure, write down the setting. We will be changing the setting and then changing it back. The Permalink settings are Plain, Day and name, Month and name, Numeric, Post name, and Custom Structure.