Hi Mark,
Thank you for the inquiry.
Could you help to share the error you got when doing the model initialisation? It will be good if our teams can analyse the log and do the troubleshooting 
Also, developers not only need to sign the NDA but also apply for the NeuroPilot Account for access to NeuroPilot Documentation.
Here is the topic How-to-Get-An-Neuropolit-Account that might be helpful.