Hello,
I can help you to set up your Custom Domain on another website and set up a fully working platform without any errors.
I have 10+years of experience in Server Security & Hardening and Migration related-task, we are able to provide you with the highest level of service and include AWS Cloud, GOOGLE Cloud Platform, Microsoft Azure; Digital Ocean, Linode, Vultr, Alibaba, OVH, Cloudflare, Load-Balancer; MySQL, Apache and Nginx Replication/Clustering.
Let's start a chat session for further discussion about your task, then I'll start it now.
Thank You.