Confusing error messages from Environment resource

[IaroslavTitov]

What happened?

404s returned on create

Example

Updating (org)

View in Browser (Ctrl+O): https://app.pulumi.com/contoso/pulumi-cloud-bootstrap/org/updates/24

     Type                                Name                        Status                  Info
     pulumi:pulumi:Stack                 pulumi-cloud-bootstrap-org  **failed**              1 error
 +   ├─ pulumiservice:index:Environment  base-dev                    **creating failed**     1 error
 +   └─ pulumiservice:index:Environment  base-prod                   **creating failed**     1 error

Diagnostics:
  pulumiservice:index:Environment (base-dev):
    error: [404] 404 page not found

  pulumiservice:index:Environment (base-prod):
    error: [404] 404 page not found

  pulumi:pulumi:Stack (pulumi-cloud-bootstrap-org):
    error: update failed

Outputs:
    productionAccessToken: [secret]

Resources:
    11 unchanged

Duration: 3s

Output of pulumi about

Not relevant

Additional context

No response

Contributing

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[IaroslavTitov]

Fixed in #375