AutoSSL Self-signed cPanel certificates, DNS and Domain are 1 Server, Website Another

So, I have Domain registered, and had setup DNS, Domain Name and website hosting all on the one server (in the cloud.)

Now, I want to move only the website to another server (separate provider and possibly the website designer's server), with a different IP address. I have changed the DNS from old website IP to new. But browsers say it is not secure.

I have remove and readded the Lets Encrypt AutoSSL, but same issue, but now the cPanel AutoSSL says it cant add either the [domain.com](http://domain.com) name as well as [www.domainname.com](http://www.domainname.com) to the new cert as the IP is not on this server.

What am I missing? I dont have access to the new website host, but I can send them emails.