Admin log in link no longer working

Have you been using a plugin to set up that alternative login address? If so, try disabling the plugin and logging in via the WP default login.

If you are unable to get to your admin pages, you can use an FTP client (like FileZilla), or your web-host’s cPanel or file manager to do this. File manager is easiest if this is new to you. Navigate to wp-contents/plugins, find the specific plugin’s folder and rename it (add ‘-hold’) to temporarily disable it.