Hi @dharihar
Welcome to the Auth0 Community!
According to our Knowledge Article on “Trying to create a binding for an action that has not been deployed yet”, the build has most likely not yet finished. Can you try to increase the delay between deploying and trying to assign to up to 2 minutes?
You can read more about that here → Management API Error "Trying to Create a Binding for an Action That Has Not Been Deployed Yet"
Thanks
Dawid