Hi @tarzine,
OK. This is a beginner question. Very simple. You are now doing something wrong. Or you are expecting a different result.
When you cloned a website, you copied the entire installation, WordPress and everything else. You do not need to install WordPress first (as other backup plugins do).
You should immediately install your cloned website with the Duplicator plugin. In other words, you should transfer your old/cloned website to a new domain (empty domain). And you should do this in the following way. Go to the new website. Delete everything. Absolutely everything.
You need to open a new database on the server. (Or if you want you can use the old database but all the data will be overwritten.) You need the following information:
database name
database username
database password
Now you need to add the backup archive (zip file) and the installation file (php file) to your new/empty website:
(long_name)_archive.zip
(long_name)_installer.php
Start the installation. So you will type in the internet browser:
https://www.yournewdomain.com/long_name_installer.php
You already know all these steps. Duplicator will open with the settings. Follow the instructions. That’s it. Very simple. After completing the last step, you will be on your new website. In fact, you will be on your old, cloned website on the new domain. Now you can continue updating, fine-tuning and editing your website.
I hope this helped you. Have a nice day,