Vulnerability Scan on the Threat Analytics appliance found that it has a "CN=$HOSTNAME"
Port: 443/tcp, 3000/tcp, 8443/tcp | CN: $HOSTNAME
X.509 Certificate Subject CN Does Not Match the Entity Name (certificate-common-name-mismatch)
After deploying TAP you need to install a proper certificate, use the Create a Java Key Store File documentation section to create a jks file.
Follow the documented steps to create a jks and upload to TAP server.
Then restart both "Threat Analytics Engine" and "Threat Analytics Admin App". (A reboot may be required)
Perform the vulnerability scan against the 443,3000,8443 ports again.