Solved: WordPress Error: The requested URL /wp-login.php was not found on this server

We recently had an issue when trying to log into the admin area of a WordPress site.

The log in box would appear but when we went to log in, this error message was displayed: The requested URL /wp-login.php was not found on this server

After searching around on the internet and trying a few solutions, we started trying disabling plugins to see if one of these was causing the issue. We did this by renaming one plugin folder at a time, located in /wp-content/plugins

The plugin which was causing our site issues was the 'Automatic Domain Changer' plugin. We simply renamed the plugin's folder and then tried logging in again. Everything was back to normal.