TypeError Failed to Fetch while creating SiteWise Gateway

The "TypeError: Failed to fetch" error commonly arises during network requests, such as API calls, in web applications.

It often stems from CORS (Cross-Origin Resource Sharing) restrictions, where the server must explicitly allow requests from the frontend's domain.

Check backend response headers to ensure the Access-Control-Allow-Origin header permits requests from your frontend domain; if missing or incorrect, this error occurs.

When using AWS API Gateway with Lambda functions, ensure Lambda responses include appropriate CORS headers like 'Access-Control-Allow-Origin'.

Additionally, review event listeners in your web application, such as those for form submissions or button clicks, as adding event.preventDefault() within these listeners can sometimes resolve fetch-related issues.