So I added an addon domain in cpanel. Before I had registered this domain through a hosting company, so I just changed the DNS at their site pointing to my new location(siteground). Also I used the DNS adresses from my primary domain at siteground. When I try to access the site - "dns cannot be resolved".
Could there be some sort of issues with the DNS settings being wrong? Or maybe there is something wrong with wordpress installation/ databases etc?
Is there a good way to find the root of the problem?