Just few things:
1. When calling the https SMP URL and using port 8081 from POSTMAN or Rest Client, just be aware if you are using the self-signed certificate, you need to import the SMP cert into the Trusted Certificate Authorities in the browser, otherwise, you won't be able to register.
2. When specifiying the X-SMP-APPCID header value, you need to provide a value ot it or remove it and SMP will populate it automatically for you.
Thank you
