Thanks for your help. Apache was set up correctly. The issue was that there was no index.php file created. Once I copied the index.php file from my local WordPress folder, everything worked beautifully.
I’m not sure if this is a bug in the installer, or due to my lack of experience.
Either way, a suggestion would be to create a video tutorial that shows how to use the Duplicator with XAMPP. Since you have videos on how to use these things separately, a video on how to integrate these should not be too difficult.
Anyway, excellent plugin!