“I have a domain with GoDaddy WordPress connected to it. I bought a second domain and want to connect it to WordPress as well, how do i do that?”
“There are 2 scenarios you're dealing with. The 1st response I'm going to give you will more than likely be the issue you're dealing with.
1) Go into your cPanel account, or whatever platform you're using to upload Wordpress.org applications to each of your domains, and upload it. You can do it with the Installatron. Make sure the domain you're putting Wordpress.org on is connected to your hosting platform.
2) If you're trying to connect 2 domains to 1 Wordpress.org application, you can mask your "alternate or secondary" domain or simply redirect the domain to the preferred domain, containing the Wordpress application.
For info about masking domains, visit Manually Forwarding or Masking your Domain Name.”