How can I troubleshoot a "SyntaxError: Unexpected token '<'" error when parsing JSON received from an API?

First, check the URL of your API endpoint carefully for typos. Then, use your browser's developer tools (Network tab) or a tool like `curl` or `Postman` to inspect the raw response from the server. This will show you exactly what data is being returned. If it's HTML (likely an error page or login prompt), investigate why the server isn't providing the JSON data you expect, such as incorrect authentication or a server-side error.