WordPress Dashboard inaccessible

I'm a beginner trying to start WordPress for the first time.

My domain is Xdomain's paid one-year contract domain and I use Xdomain's free server.

Xdomain Administration Panel - > List of Installed WordPress - > Go to Dashboard
So I'm trying to access the dashboard, but I can't get in because of the error below.

You can access it from a software called FFFTP that you personally downloaded on your computer, and you can check what files you have.
There are a lot of downloaded and installed correctly.

WordPress Dashboard inaccessible

When I try to access the dashboard, it looks like this:

Cannot view this page

Workarounds

• Verify that the web address is correct: http://---My URL ---.com
• Search Bing for "http://---your URL ---.com"

Update the page to the latest information

Details

The DNS name does not exist.
Error Code: INET_E_RESOURCE_NOT_FOUND

The URL contains http://---My URL ---.com/wp-admin/.

• WP_DEBUG false set to true

define('WP_DEBUG', true); 

• Deleting the Explore Cache
• Reset your Explorer password
• Initialize, uninstall, or reinstall WordPress installed