Error "This feature is not available for your plan"

Problem statement

The below error is received from a Management API call:

This feature is not available for your plan. To create or modify prompt templates, please upgrade your account to a Professional or Enterprise plan.

Cause

The customer has an Enterprise account, but their current contract is not attached to the tenant.

Solution

To request that the tenant be added to their contract, they must contact their account executive or customer success manager or open a support ticket.