WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture...
A “403 Forbidden” error means the server is refusing access to the requested resource. Check whether it affects the whole website, a single page or only connections from a particular network. Record the affected address and the time the problem occurred.
Review any available logs and check file permissions, access rules and security restrictions. If the error appears when opening a directory, check that an index file, such as index.php, exists. Do not enable directory listing or grant unrestricted permissions as a quick fix. Save the configuration before making changes, then change one thing at a time.