If you’ve only added one A record, or if your DNS provider only allows adding one A-Record, this connection error will show in your dashboard. This isn’t an optimal setup, but your site will work.
Adding two A-Records helps with load balancing and redundancy in case anything happens to the primary server. Basically if the primary server went down, there’s a backup server to ping to load up your site (simply a precaution).
For an optimal setup, we recommend that you add two A records. And if your registrar doesn’t allow that, we recommend that you point your custom domain nameservers (NS records) to a third party DNS provider. Then, you can setup the DNS records within the new registrar’s dashboard.