You can use the below links for deploying the NSX-v Controller:
Deploy NSX Controller Cluster How To install and configure NSX-V 6.4 - Part 4 - MF blog
And for troubleshooting the issue you can use this link NSX Controller Deployment Issues
If this didn't help can you explain more about the issue. did you try to create normal VM and can select the Port group.
I hope this answer your question and i hope that this become answer or helpful comment for you. also, for More details and more information just follow my blog https://www.syncgates.com
Mostafa Fahmy