Multidomain certificate is not valid for a subdomain


I have purchased a multi domain certificate. I have added a new website and assigned that certificate. That website is for a subdomain, but when I load the site, it sends an error telling that the connection is not private.

When I used Comodo SSL Checker - SSL/TLS Certificates Checker Tool tool for that subdomain, this is the error:

“The domain name does not match the certificate common name or SAN!”

By seeing the SANs, these are:

“Alternative names (SANs) :,”

FQDN for the subdomain is:

How can I solve it?