if your main domain doesn't have subdomains: Why do you need a wildcard certificate?
Creating a certificate with
crownglobalhr.com
www.crownglobalhr.com
would be enough.
You can create max. 50 new certificates per domain name per week.
And you can use http-01 validation, a text file under /.well-known/acme-challenge.
So if you don't have too much subdomains, it may be easier to create explicit certificates.
PS: Your older thread: