The error typically occurs when a network request is being made, but no URL or link was provided in the request. This can occur when you're trying to make an HTTP request, like getting data from an API, but forgot to specify the URL. To fix this error, double-check the code and make sure that you're providing a good URL in your request. If you're using a framework or library that requires a URL or link to be passed, ensure that you're passing the URL correctly. if this error message is still occuring, be happy to share code or more context.