DNS domain ???

I have 3 websites. These 3 domains I bought outside the infinityfree service.
I want to connect these 3 domains to my website at infinityfree.
I connect only by changing the domain nameservers to ns1.byet.org, ns2.byet.org, ns3.byet.org, ns4.byet.org, ns5.byet.org.
2 of them managed to connect, but for third domain did not succeed. When I check through here , there are many errors. Unlike when compared to here. What’s wrong with that? What’s the solution ? Thank you…

okay the problem is over. I am setting to domain aliases, deleting and recreating domain aliases. My website can already connect. Sorry for the inconvenience.