I shouldn’t move the server carelessly in the future.
Modifying your DNS takes longer than you think.The first setup is almost immediate… Time will tell when modifying name servers.
I sent an existing site from vultr to a snapshot to another account. I modified the A record with that IP, but the connection is refused. Is it because of the SSL settings in plesk?
Both DNS and SSL. Then, you can cancel the SSL settings in the previous plesk!