If API is chosen in Portal API and you choose SUBMIT to check if you get a response, nothing shows up. There are no error messages either.
The token end point is the tenant name. You must have a host file entry of this in the portal machine.
In the portal machine, open the /etc/hosts file. Create an entry with the portal ip and <tenant_name>.<domain-name.com> and <tenant_name>-ssg.<domain-name.com>
See the following section in documentation to update the hosts file
Edit Hosts File for Local Access
Example: If matse04 is your tenant then your entry would look like this in /etc/hosts
126.96.36.199 matse04-ssg.ca.com matse04.ca.com