Failure to attach sslcert (Self Signed) to a domain CWP7 Centos 7.8

Good Morning Team

  Created a new vps centos 7 cwp7

  ssl on host name works fine

  added a domain

  waited 48 hours

  Tried adding a self signed ssl cert, and it complains that webmail and control panel have dns problems

  Looked at the domain via introdns.com and everything is fine...

  https://intodns.com/esoftc.com

  any ideas please....

 All the best from Alan & Thank you