[Vuejs]-Able to ssh to server using only one domain yet they all use the same ip

Am I correct that you are attempting to connect to the different domains via different saved configurations in your SSH terminal app. If so, check that you have connected each of those configurations to the appropriate private key. And of course check any other settings you may have needed in those configurations.

For example, make sure that if the host name for the working one is <username>@<domainOne> then the others are not simply <domainTwo.com>. (Errors like this can be hidden in some SSH terminals if the domain is very long.)