SSL not being able to be installed

I have moved a site with an SSL cert from one server to another (CPanel Fedora) but when I try to install the SSL cert on the new server (using the 'x' theme), I put in the domain and username and it 'finds' automatically the Cert and Key, I enter the IP, but then the button on the top "Do it" is unclickable! (only the "reset" button can be clicked). Now before adding the cert and key and username etc the button WAS clickable, only later it becomes unclikable... any ideas? (The cert is valid and worked just fine on the old server).

 

 

 

 

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