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Your message contains just a stack trace with no other information about what your Pulumi app is doing. It's hard to help you diagnose what is wrong.

But from what I can gather it seems like your Pulumi app has a stack reference to another stack. And that its name is injected using a stack config property called `env_name`. Did you set that stack config property for your `vmtep-catalog.prod` stack? I am guessing its value is supposed to be `prod` such that the stack reference then becomes `core.prod`. Does `core.prod` stack exist in the same organization as `vmtep-catalog.prod`?