Hi Arash,
Thank you for your response and suggestions. I had all the points you suggested while creating the slice.
Seems the issue was somewhere else, while running the verbose the obvious message was “Key Mismatch on the Slice Node”.
I managed to get it work and the only thing I did differently this time was to clear all keys I had created before from jupyterhub and the portal and created new ones.
Appreciate your support.