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are you using an S3 bucket as your backend?

```     Type                             Name                          Plan       Info
 +   pulumi:pulumi:Stack              vpc-david-test.sbx.us-east-1  create     1 error
     └─ pulumi:pulumi:StackReference  hatch-infra/region/None                  1 error

Diagnostics:
  pulumi:pulumi:Stack (vpc-david-test.sbx.us-east-1):
    error: preview failed

  pulumi:pulumi:StackReference (hatch-infra/region/None):
    error: Preview failed: unknown stack "hatch-infra/region/None"```

<@UCWG26BH7> nah we’re using the pulumi cloud

David can list stacks successfully with `pulumi stack ls`

can you file a ticket with <mailto:support@pulumi.com|support@pulumi.com> for this? we should probably get on a call and take a look

just to be clear we have someone monitoring that channel so someone should pick it up quickly, sorry for the redirect!

update: the stack config file name was incorrect. easy fix! with that said I wonder if there’s some way to verify the file exists when running Pulumi?