Hello, I have been trying to deploy a simple application that uses the Vertex AI Gemini API, but I am completely blocked by a persistent 404 error. Here are the steps I have already taken: 1. Created a brand new Google Cloud project (PII Removed by Staff). 2. Successfully linked my verified billing account. 3. Clicked the “Activate” button to upgrade from the free trial. 4. Enabled the “Vertex AI API” for the new project. 5. Created a new Service Account and correctly assigned it the “Vertex AI User” role. 6. My application is deployed on a PaaS (Railway) and uses the correct Service Account JSON and Project ID. The application code is confirmed to be correct. Despite all of this, my application fails with this error when calling any model: “An error occurred during generation: 404 Publisher Model `projects/gemini-final-app/locations/us-central1/publishers/google/models/gemini-1.0-pro` was not found or your project does not have access to it.” This error happens for all model versions I have tried (`1.5-pro`, `1.0-pro`, etc.). I also do not have permission to create a direct support case, which might be related. It seems my new, activated project is not being correctly provisioned to use Vertex AI services. Can anyone from the Google team please help investigate my project’s status? This is a complete blocker. Thank you.