Hello, This is an issue with the n8n application layer, not the Zeabur platform. The inability to select an AI Model is usually due to: The AI service credentials (API Key) configured in n8n have expired or are invalid. There has been a change in the AI service provider's API. Please go to the Credentials page in n8n to verify if your AI service API Key is valid, or try recreating the credentials. For further assistance, it is recommended to consult the n8n community forum.