How can I ensure the ChatGPT API key is correctly configured in my client-side application to avoid errors?

Double-check that the API key is correctly embedded in your JavaScript code and is not exposed in client-side source code (consider using environment variables). Verify the key is valid and hasn't expired. Ensure the key is associated with a valid OpenAI account and has the necessary permissions to access the ChatGPT API. Avoid hardcoding the API key directly in the code – use secure storage mechanisms like environment variables or a backend service.