First step is to make sure

1. If the domain is pointing to your webhost
2. You already have account for the same domain on your host.
3. If you have recently changed the nameservers then please wait for 24-48hrs while it propagates

If you have your domain and hosting properly configured then...

As the error says "please make sure you have entered correct path" that means the folder path is not matching with the url path.

So how do you find the path?

There are 2 ways: a) from FTP b) cpanel

a) Using FTP: When you login to FTP using the same username and password, locate the folder (double click on it to go insided the folder)
as you would normally do for uploading any file, and the FTP software will show you the path for your selected folder.

And if its addon domain or the domain is assigned to a separate folder than /public_html/ you will see

b) Using Cpanel: You may use the Cpanel's filemanager. Select the folder (double click on it to go insided the folder)
and on the left-top side you will see the folder path.

And if its addon domain or the domain is assigned to a separate folder than /public_html/ you will see

Its no different than if you were to upload and install the script yourself.

eg. if your have addon domain hosting and the folder for your domain is /public_html/domain.com/
how is it possible to work if you just select /public_html/ ??

If you need a help finding the folder path for your domain, you may contact your webhost and they
would be happy to tell you the webroot path of your domain..

Remember.... its not the server root path.