Hello, I am trying to connect n8n to the Google Gemini API, but I am getting a persistent “400 Bad request - *GenerateContentRequest.contents: contents is not specified” error. My Configuration seems correct: - Method: POST - URL: https://generativelanguage.googleapis.com/v1/models/gemini-1.0-pro:generateContent?key=MY_API_KEY - Headers: Content-Type = application/json - Body (Expression): Using a valid JSON structure with a variable from my trigger. What we have already debugged: - Confirmed the URL is 100% correct (no typos, correct API version and model name). - Confirmed the API Key works (a `curl` test from my local machine gets a specific API response, proving authentication is working). - Confirmed the Headers are correct. - Tested with a hardcoded body (e.g., “text”: “test”), which also fails with the same error. - Completely deleted and recreated the HTTP Request node from scratch. - Confirmed the Trigger node is providing valid, non-empty data to the node. - Enabled Billing on my Google Cloud Project. - Enabled the “Vertex AI API” for the project. - Waited over 24 hours for daily quotas to reset, but the error persists. - I cannot open a support ticket with Google Cloud as my account does not have a support plan. The workflow always fails at the HTTP Request step. Could this be a network issue with my n8n.cloud instance or an account-specific problem? Thank you for your help.