Unaple to access the application

If I understand well, You`ve applied a certificate to a virtual server: -with FQDN it is OK, not giving a cert error -with IP address it is giving a cert error

This is how it should be, the FQDN should match with the common name field in the certificate.

Solution: Provide the FQDN in the common name field, plus provide the IP address as a Subject Alternate Name (SAN). The con of this solution if in the future You change the IP address for the virtual, the cert error will came back.